Trip Report: October 17-22, 2018

I’ve gone through some additional cards and have some more data on squirrels from the deployment that had squirrel captures earlier this spring. As with the results for Pileated Woodpeckers foraging on hickories, I think this tends to exclude squirrels as the source of extensive scaling on standing mature boles. That will be the subject of the next post, which should be up within a week. In the interim, here’s the October trip report I’ve been promising.

We had no possible encounters and found little suggestive feeding sign this time around.

I spent the first two days with Matt Courtman (and his brother on the second day) in the vicinity of last November’s Saucier sighting. The first day was rainy enough to depress avian activity but not quite enough to keep us indoors. The ground was wet but mostly not unbearably muddy.

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The second day, we found a scaled sugarberry (Celtis laevigata). Tanner called this species hackberry, which is the common name, but it’s not to be confused with the common hackberry (Celtis occidentalis), which is found farther north. Despite the appearance, the tree was either barely alive or very recently dead, since leaves were still visible on the upper branches.

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Sugarberry bark is thin, and it can fracture and break off in large chunks. Pileated Woodpecker is a possibility for this type of scaling, but it is interesting nonetheless, and it strongly resembles ivorybill work on a sugarberry (mislabeled as a “gum”) photographed by Allen and Kellogg in the Singer Tract.

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Bark scaling on sugarberry. Hand-colored photo by Arthur A. Allen.Courtesy of the Division of Rare and Manuscript Collections, Cornell University Library

There were also horizontal bill marks on the surface of the wood. These were interesting and perhaps suggestive; these superficial scratches are the only horizontal markings on sapwood that I think may be suggestive of ivorybill.

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There is so much potential habitat in this area that I’m unsure how to go about searching it, given our small team and limited time and resources.

I spent the balance of my time in our main search area. Tommy Michot and our new team member (I hope to include some of his photographs in a future post) joined me for part of the trip. Because we now have 8 functioning trail cams in the field, much of my time is devoted to servicing the cameras and changing cards.

On the last day, Matt, Lauren (his wife), and I explored a very narrow corridor of near old-growth forest that stretches for several miles to the east of the main search area. We also spoke to someone who had ivorybill sightings, though not recent ones, in the area discussed in this post.

We found more fresh beaver sign than I’m used to. The tree shown is an ash, uncommon in our search area.

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It was a very snaky trip. I had a few near misses with cottonmouths. A coral snake was a major highlight, spotted and avoided on the road by the new Coyote. I was even able to capture it briefly on video before it buried itself.

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We saw turtles too.

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And all the rain meant fungi were plentiful (including a meal’s worth of chanterelles, not shown but brought home and enjoyed).

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There was plenty of woodpecker activity, though it was sporadic, and there was not much drumming. It’s always tough to get good pictures with leaves on the trees, but this Red-headed Woodpecker was cooperative.

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In all my years of searching, I had never found the remains of a Pileated Woodpecker until the trip before this one. It’s a little unnerving for this to happen back to back. I also found Red-shouldered Hawk remains (though not in the same vicinity). I worry that these birds may have been shot, though there’s no evidence for it. The remains, feathers and a few bones, were on top of a log, suggesting that a raccoon was the last creature involved.

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One of our trail cams was hit by a falling limb, and was aiming skyward when found. It appears to be functioning and has been re-aimed at the target tree (where there was an intriguing capture in the summer of 2017).

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We didn’t find much interesting scaling, although some of the work we found was on oaks, which is rare.

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I don’t know the tree species, and Pileated Woodpecker is a possible source, but the work below is unusual. Edith Kuhn Whitehead once told Frank that cambium shredding, possibly like that shown, is suggestive of ivorybill; however, I only heard this second-hand and am not clear about what she meant.

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The sunrise on my last field day was spectacular.

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Stay tuned for squirrels . . .

 


Recent Trail Camera Results Part 2: Squirrel(s) on a Sweet Gum Stub

Summary

I suggest reading Part 1 for background and context, if you haven’t already.

The target of this deployment (5/3-6/3/2018) was the sweet gum stub discussed here. The tree was killed when its top was blown off in spring 2015. A patch of recent scaling was found this season. I suspect the initial scaling is woodpecker work, but squirrel is also possible. The extent is modest in terms of what I hypothesize is diagnostic for Ivory-billed Woodpecker:

A particular and distinctive looking type of extensive scaling (large contiguous areas with bark removed) with associated insect tunnels on bitternut and pignut hickory boles – live trees, snags, and stubs – may be diagnostic for ivorybill. For recent work, the presence of large bark chips at the base of such trees is a related potential diagnostic.

Insect tunnels are present on this stub. Species is/are unknown, and tunnels are small compared to those found in the hickories.

In contrast to the hickory discussed in the previous post, there were no woodpecker captures over the course of this deployment and squirrels were very active on the scaled area, appearing on May 4, 5, 8, 10, 12, 13, 15, 17, and 22. There were multiple visits on some days, and the total time spent on the scaled area was significant, upwards of an hour, with at least one visit lasting nearly 25 minutes. It was surprising that squirrel activity ended on the scaled area ended on May 22nd, and there was none over the next 11 days.

Over the course of this deployment, squirrels removed a modest quantity of bark, apparently in strips, from part of the scaled area. They did this inefficiently – with some difficulty and with the grain. The bark, already softer and weaker than hickory, has weakened in death and is at best moderately tight (relatively easy to peel off by hand). Captures from the first and last full days (note the Hooded Warbler on the branch to the left) of the deployment reveal how little bark was removed, all or almost all from the right side of the scaled area. (Click on the images to enlarge them.)

 

 

This suggests that squirrels are unlikely candidates for removing bark from hickory boles in quantity, leaving large chips behind, or initiating extensive scaling on hickories. In my view, it’s probably impossible for them to do so. The results for Pileated Woodpecker from the hickory deployment and squirrel from this one support my hypothesis that Ivory-billed Woodpeckers are the source of the initial hickory scaling. But more data are needed.

Background

Before turning to the trail cam captures and accompanying images of the scaled surfaces, I’ll provide some background information on the impetus for this post and on squirrel behavior.

An email discussion of squirrels and bark scaling was ongoing prior to my starting to review the images from this deployment. Wylie Barrow suggested an alternative explanation: that squirrels might be the source of much of the scaling (including the work on hickories) that’s taking place in the search area. He pointed out that  . . . “Squirrels have removed bark from 1/4 to 1/2 of the trunk and several large branches from large oaks in my yard… and they work with great speed. They often leave large bark chips on the ground beneath the trees. Trees are living and bark is tight and fairly thick.” (W. Barrow, pers. comm.)

At first, I took some umbrage at this suggestion, thinking that I had thoroughly examined and considered what squirrels might be doing on the hardwoods in our search area and what the upper limits of their capacities might be. While my basic views on this are unchanged, and the trail cam images tend to support those views, I’m grateful to Wylie for keeping me on my toes.

It’s certainly true that in the past I have failed to consider squirrels and the role they might play in bark scaling, and this has led me down some blind alleys, as was discussed in a series of posts in early 2016. I have also been too confident in those conclusions, even though I think this material supports them. Wylie’s suggestion led me to conduct additional online research on squirrels (and he provided additional references).

I had a number of off-the-cuff theoretical and observation-based objections to Wylie’s suggestion.

One evolutionary objection is reflected in a comment I made early in our exchange: “the predator in question would have to have evolved to take advantage of this very narrow window of opportunity when the insects are near the surface . . .” I thought and still think this points toward a woodpecker as the source, and toward a Campephilus woodpecker in particular, since this foraging strategy is characteristic of the genus.

The hickory scaling is associated with sapwood dwelling Cerambycid infestation, and signs of woodpecker activity (targeted digging around exit tunnels) are present in all cases. The homepage tree was very recently scaled when found, and woodpecker evidence was present. Wylie replied that squirrels are opportunistic and might be feeding on larvae; he went on to suggest that woodpeckers following the squirrels and doing targeted digs around the exit tunnels was a possibility.

In one paper on a tropical species of squirrel, it was observed that they prefer palm nuts infested with beetle larvae. The authors also note that squirrels have a strong preference for obtaining food in the most efficient manner, and that Eastern gray and fox squirrels will choose nuts lacking an endocarp (the hard inner shell) over those that are harder to open. When confronted with an endocarp, the tropical squirrels would attack it at its weakest and thinnest point, as do Eastern gray and fox squirrels :

Two of these pores have dead ends (with 1-mm depth), and the third is the germinal pore, which is deeper but is closed by a soft and easily penetrable tissue, located on the side opposite the fruit’s internal gibbosity. The internal gibbosity is a projection of the endocarp that inhibits the squirrel’s access to the endosperm when the fruit is opened from the side containing the dead-end pores. The squirrel must determine the position of the internal gibbosity to avoid it and thus save energy and time in obtaining the endosperm. These rodents are known to identify the side without the internal gibbosity even before beginning to open the fruit, with >90 percent success (Bordignon et al. 1996, Mendes & Candido-Jr 2014). However, how the squirrel identifies the side without the internal gibbosity remains unknown. As the gibbosity is always on the side opposite the germinal pore (Bordignon et al. 1996), this pore is an important access point that the squirrel can use to open the fruit efficiently. It is believed that the squirrel manipulates the fruit by pressing the three pores with its upper incisors, using the pore without a dead end for support so that the lower incisors can open the endocarp (Bordignon et al. 1996).

Efficiency is one of the main factors that determine the foraging strategy of Sciuridae. A laboratory study conducted with the squirrels S. carolinensis and S. niger found that individuals preferred various species of nuts with low energetic value that lacked an endocarp or shell over high energy nuts with an endocarp (Smith & Follmer 1972). These results suggest that there is a high cost in energy expenditure for processing seeds with endocarps for these species.

(Alves et al. “Queen palm fruit selection and foraging techniques of squirrels in the Atlantic Forest,” Biotropica 50(2): 274–281 2018). Efficiency is an important consideration in this context, especially with respect to hickories.

The reasons squirrels strip bark are poorly understood. Pine (or red) squirrels attack a number of tree species, “[d]uring winter, spring, and early summer, bark stripping and tree girdling for consumption of phloem and cambial tissues is common (Hosley, 1928; Linzey and Linzey, 1971; Pike, 1934). Pine squirrels also eat the bark of rust galls (Salt and Roth, 1980) as well as sap from sugar maple trees (Acer saccharum) in the northeast (Hamilton, 1939; Hatt, 1929; Heinrich, 1992; Kilham, 1958; Klugh, 1927; Layne, 1954) and yellow birch (Betula alleghaniensis) in the Great Smoky Mountains (Linzey and Linzey, 1971). Widespread, systematic sugar tapping by pine squirrels occurs in New England (Heinrich, 1992).” (Steele, M. A. 1998. “Pine squirrel (Tamiasciurus hudsonicus),” Mammalian Species 586:1–9).

Red squirrels have also been observed feeding on spruce bark beetles. (Pretzlaw, et al. “Red Squirrels (Tamiascurius hudsonicus) Feeding on Spruce Bark Beetles (Dendroctonus Ruffipennis): Energetic and Ecological Implications”, Journal of Mammalogy, 87(5):909–914, 2006). This was a novel observation at the time, and the behavior appears to have been a sudden and opportunistic response to a climate change-related bark beetle outbreak that lowered cone production. Spruce bark is soft, flaky, and fairly loosely adhering, and the bark beetles spend approximately a year, the entirety of their larval life cycle, in the phloem and hence are a readily available food source for a prolonged period. Moreover, “[f]oraging for larval spruce bark beetles by red squirrels is an obvious and stereotyped behavior; squirrels situate themselves on the trunk of the tree near ground level and peel off the bark to reveal and ingest larvae.”

There seems to be less agreement as to why Eastern gray and fox squirrels strip bark. It has been suggested that a calcium deficiency might be primary driver. C.P. Nichols et al., “A novel causal mechanism for grey squirrel bark stripping: The Calcium Hypothesis,” Forest Ecology and Management 367 (2016) 12–20. Bark stripping by Eastern gray and fox squirrels seems to be more prevalent in areas where the species have been introduced, “[b]ark-stripping behaviour, reported so often in Europe (Shuttleworth et al. 2015), is extremely rare in their native range (Kenward 1989).” (Koprowski et al. “Gray not grey: The ecology of Sciurus carolinensis in their native range in North America”, posted on Researchgate.com, 2016).

While “extremely rare” is an overstatement, it does appear that bark stripping occurs more frequently in areas where gray and fox squirrels have been introduced. It is a major problem in the U.K and Europe but mostly an annoyance in the United States. It seems reasonable to infer that it is more common in suburban and residential areas than in mature bottomland hardwood forests, though Wylie points out that the discrepancy in the reporting may be due to demographic factors and that squirrel behavior in bottomland hardwood forests has been poorly studied.

Gray and fox squirrel bark stripping seems to occur most frequently on branches, and I found no images in which insect infestation of the scaled areas was apparent. In addition, the examples of extensive squirrel scaling found online in no way resemble what we’re finding on hickories. Thus far, we have found only two references to squirrels stripping bark from trees in the genus Carya, one from pecans in Georgia and one from limbs in West Texas pecan orchards, where fox squirrels have been introduced. It’s not clear what parts of the trees were involved in Georgia and whether this report also came from an orchard, but regardless, pecan bark is flaky and not criss-crossed, making it easier to scale.

While neither Wylie nor I conducted an exhaustive literature review, we found no records of gray or fox squirrels scaling bark from any bitternut or pignut hickories (Carya cordiformis and Carya glabra), be it on limbs or boles, in several Google searches. Given the extensive range of these species – most of the Eastern United States and into Canada – and the association between squirrels and oak-hickory habitats, if squirrel scaling of hickories occurred with any regularity within the natural ranges, one would expect references to be abundant in both the popular and scientific literature.

As mentioned in the previous post and implied above, I suspect that the criss-cross pattern that characterizes pignut and bitternut hickory bark is one factor that deters squirrels from removing it and may prevent them from removing it in large pieces. This relates more generally to the question of efficiency. The characteristics of hickory bark make it extremely difficult for any creature to remove. In addition to the pattern of the grain, it is literally the hardest, strongest, thickest bark in the forest. On mature boles it can be 3/4″ thick (compared to around 1/16″ for a hickory endocarp). It is tight (though less so when sap is flowing), and it retains these characteristics long after death. Bitternut hickory bark does not flake, and pignut does so infrequently and superficially.

Thus, both species are exceedingly poor candidates for stripping by squirrels, especially when sweet gums and an array of other much easier targets are available. In contrast to the hickories, the target tree in this deployment was a sweet gum, three years dead, with thinner, considerably softer, loosening bark

As I see it, all of this militates against squirrels as the original source of the hickory scaling. While this is inferential and we have yet to document whatever initiates the scaling, the data obtained thus far support the inference. Only recently have we been able to deploy enough trail cameras for a meaningful and sustained effort. Nevertheless, we have had many hours of captures since 2009, in both search areas. To my knowledge, the only prior unambiguous capture of squirrel scaling is the one from 2015; it involved a downed, immature sweet gum with thin bark, which was easy for squirrels to scale. A second clip may show a squirrel removing a very modest quantity of thin bark from a sweet gum limb that was already being scaled by Pileated Woodpeckers (second video clip at end of post), and Wylie observed a squirrel scaling a sweet gum branch (on a roadside just outside the main search area) in December 2015.

I no longer think scaling on sweet gum limbs (so heavily emphasized in Tanner) is a strong indicator of ivorybill presence, at least not on its own, although what we’ve found in the search area seems to be unusual. Abundance, lack of correlation with low mast years, bark chips, absence of incisor marks, and indications of woodpecker activity, especially targeted digging, may all be suggestive. Sweet gums, which are very attractive to beavers, are likely one of the most desirable targets for squirrels as well, for reasons of flavor and efficiency.

But we have documented no squirrel scaling on hickories, live or dead, on limbs or on boles, partially scaled or with bark intact.

I think the results from this deployment shed considerable light on the issue of squirrels and bark scaling, especially what they do (or can do?) on a mature bole with thick bark. So let’s go to the videotape, as a New York sportscaster used to yell.

Squirrels on a Sweet Gum Bole

As with the previous post, our Plotwatcher Pro trail cam is programmed to capture one image every twenty seconds, and these time-lapse sequences have been converted into QuickTime movie format. If you want to get a clearer sense of how the squirrels are behaving, you can step through the films frame-by-frame. If you elect to watch just one of the clips, the one from May 8 that starts at Frame 1500 (the squirrel spent 24 minutes on the scaled surface) or the one from May 12 that starts at Frame 1574 might be your best bets. Discussion and close-ups of the scaled surface follows the bonus imagery.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

While we had no woodpecker detections on the stub and bird captures were few, we did catch some hogs (piglets?) and a beaver. Also captured but not shown were a Northern Cardinal and an Eastern Phoebe.

 

 

Discussion and Details

As best I can tell, the only expansion of the scaled area involved a narrow strip at the upper right, probably no more than 12″ x 2″, and a little widening at the very top, although this was an area where the squirrels spent a considerable amount of time.

Let’s look at some details from that scaled area.

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Upper Part of Scaled Surface Showing New Work

 

 

 

 

 

 

 

 

 

 

 

 

 

 

While there appears to have been some woodpecker excavation at the middle left of the larger scaled patch, there’s no readily apparent sign that woodpeckers have been after the insects that are feeding in the sapwood. Nor is there any strong indication that squirrels were feeding on insects over the course of this deployment, though it’s possible they took advantage of snails and beetles, like the ones in the photo, or slugs, which I also saw on the scaled patch.

The edges of the bark shown in the close-ups, especially the one at the top, show signs of having been gnawed, although this is subtle, and sometimes impractical as an identifier, since such close examination is not always possible in the field. I presume that the abundant squiggly abrasions to the surface of the underlying wood are incisor marks, something we have not observed with other scaling we’ve found.

With regard to what was left behind, the first three photos show what I found at the base of the snag when I discovered the scaling on May 1, 2018.

 

The large, though narrow, strip of bark was the biggest one I found at the base and is one of the main reasons I suspect that woodpeckers initiated the scaling with squirrels following, although I would not rule squirrel out completely. In any event, the bark was so soft and weak that it broke in my hand when I picked it up on June 11. The other thin strips are more consistent with what I’d expect for squirrel, and the tiny orange pieces of cambium are a giveaway.

The situation had changed little during this most recent trip. The picture with my boot shows the larger pieces of bark I found at the base, including the one shown above after it broke. They may be consistent with woodpecker (possibly including Red-bellied or Hairy), but I suspect that both squirrels and woodpeckers were involved in the bark removal.

 

Edited to add: For any extensive squirrel work on mature boles, especially hickories, I would expect to find many small pieces of bark on the ground, similar to those shown above, as in this dramatic example.

My main objective in targeting this stub was to observe it over time, more for what might happen as the decay advanced and whether it might become a target for ivorybills; it’s the type of “stump” that Pearson described as being favored by ivorybills after his visit to the Singer Tract in 1932, though Pearson’s “stump” (scroll down in the linked article) was much longer dead.  The bark scaling, while interesting, was in the “could have been anything” category. Getting this data on squirrels was a pleasant surprise, one that I should have anticipated based on the small bits of cambium on the ground. My bias came into play, as I ascribed them to a smaller woodpecker. Between Wylie and the trail cam results, I’ve learned a lesson. In terms of the bigger picture, however, the results so far suggest that squirrels are not the source of the putative Ivory-billed Woodpecker scaling on hickories.


The Future of the Blog, Trail Cams, and More on the Last Trip

Thanks to everyone who responded to my request for comments about the blog and its future. It’s very gratifying to have received such positive feedback and to know that my work is appreciated. With that in mind, the comments and emails have convinced me that I shouldn’t make any major changes, even if it would have been wiser to have deliberated more before posting and amending the recent post about a possible sighting.

Apologies to those who were unable to view this post due to the temporary password protection while it was being reviewed.

Trail Cams

As mentioned previously, we currently have six cameras aimed at potential feeding trees. Tommy Michot will be deploying the seventh (on the tree discussed below) in the near future. This will put us at or near what I consider full capacity in terms of servicing the cameras and reviewing the imagery. Since Frank’s death, the task of reviewing images and working with the cameras had fallen almost entirely on Phil Vanbergen’s shoulders, and we’ve only changed cards when there’s been evidence of woodpecker activity on the target tree but have otherwise allowed them to overwrite. Recently, several people have volunteered to review the imagery, and Tommy and I have gotten a better handle on deploying the cameras. Thus, we’ll be able to shift to replacing the cards every few months and (hopefully) reviewing all the images we capture.

On the last trip, Tommy and I found recent bark scaling on a sweet gum stub, and although the bark was loose, we decided to move one of our cameras and target the stub.

 

The camera had previously been aimed at a hickory that lost its top in a storm last year, a location where Peggy, Phil, Tommy, and I heard a double knock last year. For some reason, the overwrite function failed, so the card was full when Tommy and I redeployed the camera. I brought it home to review. I found some interesting imagery that I’ll share and discuss. I think that at least one of the frames is suggestive of ivorybill, although it is far from conclusive, and no one I’ve shared it with is nearly as interested by it as I am. Regardless, I’m now convinced it’s a good idea to check every card and am very glad that Geoffrey McMullan encouraged this approach.

First a few comments on trail cams, which will update some of Frank’s observations from this post on the subject written in January 2015.

Our trail cams are made by Day 6 Outdoors. The Plot Watcher Pro is the only dedicated time-lapse mass market trail camera. It’s lightweight, easy to use, and inexpensive compared to Reconyx, the second best time-lapse option. The accompanying software makes it possible to step through the captures frame by frame or to view them as video at various speeds. (Our time lapse interval is 20 seconds.) This simplifies the reviewing process, at some cost to image quality, although this has always been a problem with trail cams.

Trail cam sensors are relatively low resolution; only in the last year or so have 20 megapixel cams gone on the market, and many brands are in the 10-12 MP range. The bigger problem is that these cameras are designed to photograph terrestrial creatures, mostly large mammals and Wild Turkeys. It’s also almost impossible to avoid backlighting over the course of an entire day. Thus, unless the subject is at fairly close range, the chances of getting an identifiable image are greatly reduced, as will become clear from the examples below. So let’s look at some of the captures. I used Let’s Enhance, an internet based, automated image enhancement program.

The card ran from January 24 – May 1, and I worked my way backwards. During that time, there was one clearly identifiable woodpecker capture – a PIWO that spent under 40 seconds on the target hickory.

Note that WordPress has changed the way photographs are presented, at least in the format I’m using. To enlarge the images in this section, click on the image, and it will appear in a separate frame. There’s an option to see the full-sized image at the lower right. You can further enlarge the full-sized images by using the cursor.

 

The first large woodpecker capture was on March 16. The bird, which is not clearly identifiable, was present from ~3:25-3:46 pm, though it was not visible in all frames. I’ve included a QuickTime video covering the entire period (and about 10 additional minutes), along with a few enhanced screen caps with a box around the bird, which first appears on the right fork of the beech tree to the left of the target, then flies to a high branch in the background and moves around before disappearing.

 

 

 

 

 

 

The next series that interested me is from the morning of March 9. A bird in flight is visible in one frame captured at 8:22 am. It appears near the beginning of this 50 frame QuickTime animation.

 

 

This is an enhanced JPEG of the relevant frame with a box around the object of interest.

 

While others disagree, I think the object in the box is the upper (dorsal) surface of a bird’s wing. (One reviewer suggested it could be a squirrel’s tail.) There is nothing to suggest the bird in question is a woodpecker (if it’s a bird at all, which it appears to be based on the time lapse). To my eyes, however, it has a pattern of black and white that is consistent with the wing of an ivorybill, if the white is on the trailing edge. Given the distance from the camera and the extent of the white on the wing, I’m confident it is not a Red-headed Woodpecker. I’m also confident that this is actually an object, based on a review of the surrounding frames and on experimenting with color, exposure, and white balance. I’ve included a few examples, in a tiled mosaic to illustrate. Again, click on the individual images to embiggen.

 

A third frame that I found somewhat less interesting was captured on the morning of February 16th. I’m less intrigued by this image. It has been suggested that it might show a Pileated Woodpecker wing or a Red-headed Woodpecker on the target tree. I’m not sure what’s going on, but I think it may show a woodpecker with a lot of white on one of the smaller trees behind and to the right of the target (which would make it too large to be a Red-headed Woodpecker). I suspect that the bright patch of white on the bird is an artifact, since it matches some of the highly reflective leaves below and to the right.

 

 

Regardless of whether any of these captures involves an Ivory-billed Woodpecker and despite the problems with image quality (which I hope are even more apparent to readers of this post), the images highlight the importance of reviewing all cards and having as many cameras functioning as is possible. I’m hopeful that this more extensive coverage, which is at or near the maximum that’s practical for us, will be productive in the future and may solve the mystery of what’s doing the initial scaling on the hickories. But as I noted recently, this will require patience, and it may take a few years.

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Yellow-bellied Slider Rescued from the Road

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Alligator Tracks

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Crawfish Chimney

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Hog Damage

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Trail Cam Deployment on Damaged Hickory

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Presumed Pileated Work on Downed Sweet Gum

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Detail of Presumed Pileated Work

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Bark and Sapwood Chips at Base of Live but Decaying Hickory. Presumed Pileated.

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Hickory Bole with Suspected Older Ivory-billed Woodpecker Work at Center and Presumed Pileated Woodpecker Work (Fresh) at Upper Right. Camera Now Deployed on This Tree Despite My Suspicion That the Recent Work is PIWO

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Damaged Hickory Now Being Monitored

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Scat (Coyote?) with Bones

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Don’t Know Why Somebody Went to This Trouble

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Don’t Know What This Is. A Sedge? Perhaps a Nutsedge?

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Cottonmouth. I Didn’t See Many Snakes This Trip. Tommy Saw Several More.

 


Wooden Wings: Following Up on the Possible Sighting, April 27, 2018

Regarding the Blog

To follow up on some comments I made in the previous post, I’m still reflecting on where to take the blog in the future and am interested in hearing from readers about their reasons for visiting, as well as what they find most helpful or enjoyable to read.

When I first started blogging in 2013, I had a few purposes in mind. Foremost among them were replacing the original Project Coyote website, which had not been operational for a couple of years, and inspiring hope in other searchers and the general public. At the time, the organized, well-funded searches had long since wound down, leaving the field to handful of independents, most of whom were searching quietly.

In the intervening five years, readership has grown, approaching 40,000 unique visits and 110,000 page views at the time of writing. My reasons for blogging have also evolved over time. When Frank Wiley was alive, he was happy to have me play the more public role, while he stayed mostly in the background. Between 2013 and Frank’s passing, Project Coyote was mostly Frank, Steve Pagans, and me; we had a number of friends, advisors, and visitors to the search area, but their active involvement in planning, strategizing, and on the ground activities was limited. During this period, the blog became a place for me to share trip reports, including details of possible sightings, and to work through my thinking on various aspects of ivorybill history, behavior, and ecology.

The blog came to play another role for me – reward for an effort that has been expensive, lonely, and sometimes thankless. I enjoy watching the traffic spike when I post something, especially about suggestive material and possible encounters. (At the same time, I sometimes get a little frustrated when it appears that people visit the site and don’t read the material or listen to the audio that’s posted; this seems to happen often according to the analytics.) I think that some of my initial haste in posting about the possible sighting was influenced by this reward (while my haste in posting my subsequent misgivings was driven by an exaggerated sense of responsibility). This is true even though Project Coyote has become a true team effort, and I can get great support and insight from my trusted collaborators.

I don’t think posting in haste is salutary, and in retrospect, it probably would have been better to take a long pause to consider and consult with the rest of the team. Even then, I suspect it might have been better to refrain from posting altogether. (Since the post is already up, some additional discussion follows below.)

The bottom line is I’m not sure if there’s value in posting additional trip reports, possible sightings, and suggestive but inconclusive data or if it would be better to circulate this material privately. I’m open to persuasion in either direction.

The Possible “Wooden Wings” Sighting on April 27, 2018

In retrospect, the main reason I started to question myself about the April 27th sighting was my failure to see any white on the wings, something that started to nag at me the following day, even before I found a Pileated Woodpecker roosting in the immediate vicinity. Of course, had the bird in question been a PIWO, some white should have been visible if lighting conditions and sightlines had allowed for it. One advisor asked if the bird could have been a Wood Duck or a Hooded Merganser. I think this is unlikely for a few reasons.*

I saw neither Wood Ducks nor Hooded Mergansers (the latter are not common in the core search area) during this trip. There were small stubs and a broken limb on the back side of the tree, poor perches, but no cavities, and my impression at the time was that the bird was a woodpecker that had landed briefly and then flown from mid-bole on the larger cypress in the photograph below. The bird flew away and to the left over the clearcut and then apparently returned, within a minute, to one of the two trees in the background farther to the left. I thought it was into the one farther in the background, a hickory, not the closer tree where a Pileated went to roost, approximately 20 minutes earlier, on the 29th.

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Location of Possible Sighting, April 27, 2018

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Clearcut area. Possible ivorybill flew in the direction of the tree line.

 

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One final comment on the sound of the wingbeats: I’m not familiar with Ruffed Grouse wingbeat sounds, which Tanner suggested were similar, and have not seen a Ruffed Grouse in the field since I was a kid. They’re rare in my county, and I suspect the numbers have declined based on the lack of recent eBird records. All are from before 2000. I listened to a couple of recordings of Ruffed Grouse wingbeats, and while memory can be tricky, I think there’s a similarity between them and what I heard on April 27 and in November 2009.

I should also point out that Tommy Michot and/or I staked out the area through the morning of May 3rd. Pileateds were heard but not seen in the vicinity of the possible sighting or using the sycamore roost during that period.

While my initial certainty about the sighting has diminished, I am still hard pressed to explain it as anything other than Ivory-billed Woodpecker. But there is room for uncertainty, so the sighting must remain a possible. My life list will have to wait.

One final note, I did not see or hear anything else suggestive of Ivory-billed Woodpecker on this trip, except for a couple of possible double knocks in response to Barred Owl playback on the 27th, earlier in the day and several miles away from the location of the possible sighting.

I’ll have another post soon on our plans for the immediate future and some additional images from the most recent trip.

*Edited to Add: Unfortunately my recording device (probably the microphone) malfunctioned last trip. There’s nothing on any of the tracks. Thus, my dictated observations on the night of the possible sighting went unrecorded as did any ambient sounds. Because I’m confident in the accuracy of my initial write up, as I had given brief oral descriptions of the incident to Matt and Patricia but had not consulted anyone or looked at any descriptive materials.


Trip Report: March 7-16, 2018

Summary

We had a sustained presence, at least one person in the search area, between February 28th and March 16th (one rain day excepted). Between the 28th and the 16th, there were no possible encounters with Ivory-billed Woodpeckers either visual or auditory. We found a modest quantity of recent bark scaling and a few fresh cavities. We were able to do some preliminary surveys of nearby areas where local people have reported seeing ivorybills; we visited one of these on foot and think it is worthy of additional attention. We aimed a trail camera at a badly damaged hickory and have identified locations for deploying two more in the coming months. In my view, the lack of possible encounters this year supports the idea that the sounds heard and recorded last March came from Ivory-billed Woodpeckers.

Introduction

I’m opting not to post a day-by-day log for this trip and will instead focus on what I think were the most important observations made and insights gained from this team effort. I arrived in the area on the morning of the 7th and was able to spend the afternoon in the field. I was joined at various times by Peggy Shrum, Jay Tischendorf, Tommy Michot, Amy Warfield, Phil Vanbergen, and Geoffrey McMullan, a British birder, artist, and woodpecker enthusiast. (His drawing of Mexico’s woodpeckers is shown on p. 139 of Tim Gallagher’s Imperial Dreams). 

Matt Courtman arrived on March 15 and remained in the area after my departure. If he has anything significant to report it will be discussed in the next post.

Erik Hendrickson’s post details his time in the search area prior to my arrival.

Sounds

As noted, we did not hear anything suggestive of Ivory-billed Woodpecker. We did more stopping and listening than I have in many past trips; we also tried anthropogenic double knocks and playbacks of the calls recorded last year and of Barred Owls at various times, between early morning and early afternoon. At approximately 9:00 am on Wednesday, March 14, Tommy, Geoffrey, Peggy, and I heard several odd and unfamiliar “boom” sounds following my ADKs. We agreed that these were not woodpecker. They were repetitive; Tommy estimated they came in series of 5-6. While they had a metallic, industrial quality, they did not resemble shots or the typical industrial noises that are heard in the area – from logging or distant road construction. They did not seem distant, but when we hiked to the area from which they seemed to have originated, we didn’t find anything.

It’s always important to remember that correlation is not causation; while the sounds seemed to be coming in response to the ADKs, we surmised that the apparent association was coincidental. Whatever the source of the “booms”, it was a strange episode.

On the 15th, Phil and I heard some distant crow calls that were a little kent-like on first impression, enough for me to turn on my recorder and capture some of them, though we suspected crow and never thought they were ivorybill. You’ll hear Phil’s reaction when it became unquestionable that these were indeed crow calls.

They sound more obviously crow-like on the recording than they did to the naked ear, but I’m including them here since crows are rarely mentioned as a potential source of kent-like calls. The faint sonogram is not at all suggestive of ivorybill; only one frequency is readily discernible, at around 1300 hz.Screen Shot 2018-03-19 at 1.40.31 PM

To reiterate, the events of last March (2017) were unprecedented. We have had a couple of encounters involving multiple calls over an extended period – in March 2013 (these have higher fundamental frequencies) and one in the old search area, January 2010 that also involved apparent double knocks. But neither of these lasted nearly as long or involved as many suggestive sounds. Other potential auditory encounters have been brief. Thus, it’s reasonable to infer that the source is not a common species in the area. The calls strongly resemble known Ivory-billed Woodpecker sounds (and resemble them more closely than they do any known species). In my view, none of the proposed alternatives (Blue Jay, Wild Turkey, American Crow, Red-breasted Nuthatch) are plausible. I’m hopeful that further analysis will support this perspective.

Cavities

I found one cavity in a pine (not photographed) that seemed right in size and shape though it was old and only about 40 feet above the ground. I have not focused on pines given the paucity of records of ivorybills using them for roosting and nesting. This is probably ill-advised. The same applies to sycamores, as Erik pointed out in his trip report.

I found one intriguing and apparently recent cavity, high in a sweet gum in the area that we’ve considered to be a hot zone. Stakeouts have come up empty, and as is often the case, the cavity is too high in the tree and too subject to backlighting to merit targeting with a trail cam. This is an ongoing problem, even when the cavities are much closer to the camera, as in the “neck bird” image.

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I also spotted this unusual, large and rectangular cavity in a cypress.

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Scaling

My thoughts on scaling continue to evolve. As time goes on, the category of what I think is diagnostic for ivorybill grows narrower. I’ve become more skeptical about much of the work we’ve found, especially on sweet gums. Nevertheless, I still think that certain types of scaling may be diagnostic and more generally that an abundance of bark scaling in a given area may be an indicator of ivorybill presence.

This is a good introduction for those who are unfamiliar with my perspective on bark scaling and what I’ve hypothesized. While I’ve been refining thy hypothesis over the years, a couple of posts from 2013  are still relevant and may provide more insights, including into the underlying anatomical rationale. There’s a gestalt involved in identifying “interesting” scaling. I look at a number of factors:

  1. Tree species and associated bark characteristics (tightness, toughness, and thickness) factor in. With very rare exceptions, I only consider hardwoods. Pine bark is easily scaled.
  2. The bark must have been removed cleanly, with little or no damage to the underlying wood (targeted digs within a scaled area excepted). It’s important to distinguish between true scaling and bark removal associated with shallow excavation; many recent searchers have not recognized the distinction (some of the work shown at the second link is true scaling and some appears not to be).
  3. Condition of the tree or snag. I generally exclude wood that appears to me more than two or three years dead (following Tanner), so twigs and small branches must remain. (The cherry bark oak mentioned below is an exception, due to the chip characteristics.)
  4. Diameter of the scaled bole or limb. Bigger is better. So are boles.
  5. Size, shape, quantity, and characteristics of bark chips. Bigger and broader are better. Chips can also help in distinguishing between scaling and shallow excavations. Sapwood chips point to the latter.
  6. Extent and appearance of the scaling. Neat edges are one factor. Pileated Woodpeckers often remove thick bark in layers, and their scaling has a messy appearance. Similarity to images of known or presumed ivorybill foraging sign (as in the example below), though these are few and hard to decipher, is another consideration; large, contiguous areas stripped of bark are required.

(Thanks to Tommy Michot for suggesting that I include this list and for his editorial suggestions generally.)

I found most of the interesting scaling on the first couple of days in the field. When I arrived in the late morning, on March 7, I went to the area where the calls were recorded last March and where we’ve had the most indications of ivorybill presence in recent years. While we often find scaled pines in the uplands, this is the first time I’ve found extensive hardwood scaling  – on a number of small, recently fire-killed trees.

Because these trees are so small, the bark, while tight, is very thin and therefore easily removed. The scaling is extensive, but I don’t think Pileated Woodpecker can be ruled out. Some of the chips were substantial. The scaled trees are shown below. Two are black cherries, but I couldn’t identify the others. The trees were within approximately 100 yards of each other and no more than two hundred yards from the edge of the lower-lying hardwood habitat.

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Water levels were high; I was hoping to reach one of our trail cameras, but conditions made it impractical to do so (avoiding flooded areas would have involved at least a two hour detour). I did find some recent sweet gum scaling in the area, including on a freshly dead snag that we’d found in December. Although some of the chips were large, I don’t feel confident ruling out Pileated Woodpecker for much or all of this work.

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On March 8, Peggy, Geoffrey, Jay, Tommy and I visited the southern area, and Peggy spotted a sweet gum that Erik had photographed during his visit. There was new scaling, apparently done within the last week or so, especially on one of the larger limbs.

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More significantly, I found a hickory with extensive scaling of the kind I suspect is diagnostic for ivorybill. My initial thought was that this was a new tree, but Phil later pointed out that it was the one he’d found last year, with a number of thin bark strips (which we attributed to Pileated Woodpecker) at the base. Nevertheless, the scaling lower on the bole of this hickory appears to be more recent, and while flooding had washed away most of the new bark chips, a couple that we found around the base are more consistent with the larger chunks of bark that I suspect are indicative of ivorybill. (The very large chip in the image may not be associated with the scaling, though I suspect it was.)

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The bark on this hickory is approximately .5″ thick, and it remains very hard and tightly adhering. This is the first time I’ve found a hickory that appears to have been visited and extensively scaled at least twice, many months or even over a year apart. This was a surprise, as I’ve suspected that the life cycle of the beetles infesting the snag meant that this kind of feeding was a ‘one shot deal’. That does not appear to be the case with this tree, so some rethinking may be required.

Figuring out what animal is the first to scale these hickories is my top priority. We currently have three cameras deployed on hickories that are damaged, including one adjacent to this snag. I hope to be able to deploy two more this spring. If it turns out that Pileated Woodpeckers are responsible for the initial work, I will be persuaded there’s no way to distinguish between PIWO and IBWO work, although abundance and bark chip characteristics might still remain as possible indicators.

I remain convinced that the ivorybill has persisted and has been present in our search area, at least sporadically, but I will be disheartened if it turns out that there’s no qualitatively diagnostic feeding sign. Tanner relied heavily on feeding sign during his surveys (though he accepted reports from South Carolina where little or no sign was found) and rejected the 1970s Big Thicket reports in large part due to the absence of bark scaling.

If Pileateds are doing the initial scaling on these hickories, then Pileateds could be the source of virtually all scaling found in any part of the ivorybill’s historic range, including on live or freshly dead trees of any species. If this proves to be true, then the presence of feeding sign will be a weaker and more subjective indicator of presence.

But on a more upbeat note, we also found some scaling on a cherrybark oak. Because I’ve come to suspect that PIWOs can scale sweet gums extensively and well, other tree species are of particular interest. Though the tree was alive, the limb from which these chips were stripped was not recently dead (photographing it was impractical), with no twigs or small branches remaining. Nevertheless, the chips were large, hard, and dense. I haven’t found chips like these since 2013, and I think they are intriguing.

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On March 12, we found one more scaled sweet gum that piqued my interest. The jagged appearance and extent of scaling on the bole are suggestive of known ivorybill work, subject to the caveats provided above. There was also extensive older work higher on the trunk.IMGP5945

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Jagged scaling on 1935 Singer Tract Nest Tree. Courtesy of the Rare and Manuscript Division, Cornell University Library.

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Local Reports

We were rained out on Sunday, March 11 and took the opportunity to drive around in an area from which there have been several local reports (though I have not spoken to the people involved face-to-face and do not know them personally). Some of the upland areas are impressively restored stands of maturing longleaf pine; we did not find any stands of large hardwoods, though we did find places with numerous beaver-killed trees. I did not take any photographs.

On the morning of the 12th, I stopped to meet Jay for breakfast at one of the local hangouts, and an older man I’d talked to the year before pulled me aside and asked if I’d visited the area he’d told me about then. He specifically mentioned ivorybills and was very insistent that he’d seen them there from time to time during his hunting days (he’d stopped about a decade ago.) Last year, he’d recognized an ivorybill image on my phone but had not named the species. None of the other men in the restaurant were familiar with ivorybills, but this individual clearly knew what he was talking about.

A few years earlier, another person (a preacher and barbecue chef) told me he’d seen ivorybills in the same bottom (stating that he’d thought the ‘ones with white on the back were the males and the all black ones were the females’.

Peggy, Tommy, Jay, and I visited part of the bottom both men had identified and were impressed by the habitat, which is very similar to the primary search area. Like the main area, it appears to have been high-graded or selectively cut, so the conditions within a very narrow corridor (and one we believe to be fairly long) are near old-growth. We did not find any bark scaling during our brief visit to the area, but it definitely merits more attention. I suspect we were several miles southwest of the claimed sightings, so this may be an extensive, if narrow, strip of high quality habitat. The oak shown below (with Tommy for scale) was measured to be over 5′ in diameter, and many of the sweet gums in the area were well over 3′ DBH.

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Additional Tidbits

The woods were beautiful as spring was breaking out. Conditions changed dramatically over the course of my stay. Despite some very cold mornings (we only saw one snake), leaf out progressed rapidly. On my last day in the field, Matt and I found a loblolly pine that may be a contender for state champion; the current one is just under 5′ in diameter. I suspect the one shown below is close to that and may be taller. By the middle of the trip, wild azaleas were in bloom. And finding Red-headed Woodpecker feathers always causes my heart to skip a beat.

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I have one or two more trips planned this season and am hopeful that they will generate some new insights.

 

 


Part of the Search Team by Erik Hendrickson

I was very pleased that we were able to have searchers in the field almost without interruption for over three key weeks in February and March. Erik was in the area alone from February 28-March 6, and conditions were good enough for him to get out for part of almost every day. At present, Matt Courtman is still in the field. I will be posting my trip report within the next few days; it covers the afternoon of March 7 through the morning of the 16th. There have been no possible encounters during this period, a stark contrast with this time last year. I’ll be addressing this in my report, but in the meantime, here’s Erik’s. It was a pleasure to read. I’ve made a couple of side comments in italics.

Back in the early 2000’s, I often used the holiday break as a time to take off from work and go birding someplace I’d never been before. Following the Ivorybill rediscovery announcement in May 2005, I decided to go to Arkansas “on a lark” and at least see the habitat where the bird had been found. There would be birding opportunities – a chance to see wintering species not present at my home in Montana, and I wanted to visit Little Rock High School National Historic Site.

After several days of birding, I saw the ivorybill. Like many other sightings, it was a brief look, but I saw the bird through binoculars, sharply focused, in good light. I made 4 more trips to Arkansas and Florida in the next two years, before my job took me to Alaska for 8 years. I made no more trips to the southeastern United States in that time.

But retirement in March of 2017 allowed me time to think about a return; and Mark graciously responded to my inquiry with an invitation to join his search effort in December 2017 / January 2018. I got to accompany him and Steve Pagans again in February; and Mark had another search planned for March, but the timing and logistics didn’t quite work out. With trepidation, I asked about searching the week before the main search effort, and Mark was encouraging. I’d seen how well Mark navigated the woods he knows so well, and Steve was equally competent (Steve is considerably more competent) – and always had his GPS available to ensure we could get out of the woods.  But on my two initial trips; I often did not know where we were headed and often got turned around.  I didn’t say so, but I knew I’d have to get a lot better at reading my GPS.

Mark also encouraged me to purchase a dedicated audio recorder, in case I heard double knocks or kent calls as other searchers have in the past. This was perhaps the most obvious advantage to being in the woods in March: the likelihood that ivorybills would be more vocal and/or more noticeable if they engaged in courtship, cavity construction, brooding and interaction at a cavity, or feeding of nestlings/fledglings. If I could be in the woods a week before Mark’s major search effort, then at least I was providing some additional coverage for a possible encounter.

A friend of mine said with encouragement “I’m sure you’ll see it this time!” I didn’t respond that “I don’t think so…”. Of course I’m optimistic, but my primary goal in the field is to contribute quality hours to searching for a species which has a very low encounter rate. The more hours searchers rack up, the more encounters we have. It’s important to me to contribute by adding up those good hours.

Logistics are a major part of the search effort: traveling from my home in Colorado; arranging airflight, rental car and lodging. Being prepared with the right clothing, rain gear, hat, camera, GPS, audio recorder, first aid kit, and all the miscellaneous supplies carried each day. I studied maps so that I wouldn’t be as lost as I was on my first trips.  I could check online for the weather forecast and sunrise/sunset times. And then on my travel day, it takes about 12 hours from my house to my destination.  I pick up lunch supplies at a local supermarket, and get ready for 7 days of searching.

It’s exciting first thing in the morning – arriving at the start point, and getting everything ready to walk into the woods. I only forgot to record the location of my vehicle once – but remembered within a 1/2 mile of my start, and that was close enough to ensure I could get out in the afternoon. I start out listening to and trying to see every bird – they’re all different from the birds back in Colorado, and if I’m standing still trying to pull a Yellow-eyed Vireo out of the shrubs – well, I can be listening for ivorybills at the same time.

Much of my time in the bottomland forests, I’m simply acting as a roving Audio Recording Unit. Although I rely on my eyes more than my ears – and at times it seems that I can see a lot of the habitat around me – I know from experience that I can’t really see all that much. Woodpeckers cling to the backside of trunks and branches.  Sometimes I watch them up high, and then they move around to the opposite side of a branch – and they’re completely invisible to me. Had I not seen them move to that location, I’d never know they were there.

So as I scan the forest around me, I’m aware that there’s really only a limited amount of “space” – of “volume” – that I can peer into to check for birds. My best method for detecting the presence of many (most?) birds, is being able to hear them. So I wander around the forest, always listening, and hoping to hear a bird that may not vocalize very often.

I know from experience that I have good hearing, in the sense that I can detect very low levels of sound; often I can hear levels of sound lower in volume than my birding companions (but, sometimes others hear sounds that I miss). However, I’ve also learned that I don’t have a “discriminating” ear, and I easily confuse all kinds of species: Pileated Woodpecker sounds a lot like Northern Flicker; Northern Cardinal sounds a lot like Carolina Wren; Tufted Titmouse can sound like Carolina Chickadee. It always makes sense to me when someone tells me what I’m hearing, and often – given enough time (if the bird continues to call) – I can figure it out. But I know I’m not as good at identifying birds by sound as I am by sight.

I’m pretty good at identifying birds in the field and in photographs. Often, I only need a few pixels to correctly identify a bird. I make my share of mistakes, and often call out the name of a bird before I’ve completely processed all the information – and my initial identification (part of the thought process for arriving at a final ID) is incorrect. But while I make lots of mistakes while trying to arrive at the conclusive ID for a bird, I’ve got to be certain in the end.  Entire books have been written on this topic – and that makes sense to me.

Searching for ivorybills is very different (for me) from “birding”. Birding is a fun, enjoyable activity that I do regularly, in all kinds of habitats, with lots and lots of opportunities to see and identify birds. Searching for ivorybills is mostly just putting in hours without seeing or hearing anything. But my approach to searching is to go “birding” and enjoy the birds I see, and to be aware of the environs around me as I’m looking for or looking at, birds. I stop and pause for several minutes at a time. I’m not in any hurry – I don’t have to be anywhere else. I think about all the other recent encounters that have been described:  someone in the right habitat, often engaged in an activity other than searching – and while relaxing, or while sitting down, or while engaged in something other that “actively looking”, suddenly they become aware of a bird that they focus on, and it turns out to be an ivorybill. I think about lots of things written about ivorybills, things that I can remember and things that I’ve heard other searchers and other birders talk about. And… I wander around the bottomland forest – listening and looking.

I made a point of looking for large cavities, and I found 8 on this trip that were large enough and asymmetrical enough for me to stop and record them. I photographed each cavity (several photos, at successive zoom ranges) and marked its GPS coordinates. I tend to consider cavities that are too small (suitable for Pileated Woodpeckers – or even smaller species), but I think I’d rather be conservative in this regard. I’d thought perhaps that if I found one or more candidate cavities, I would try to watch them as early in the morning or as late in the afternoon as I could. But I realized that simply finding the cavities, and trying to find efficient routes from the cavities to/from my vehicle, would take more time than was available to me. A fresh, or routinely occupied cavity, might be distinctive in a way that would set it apart from other cavities – and none of the ones I found was notable in that regard. If I had unlimited time, I thought about aiming a trail-cam at the “better” cavities I found – and I might give that idea more thought in the future. (The last two intriguing cavities I’ve found were not good candidates for camera traps; height, backlighting, intervening vegetation can all be problems. This issue is under- appreciated, and it became more apparent to me last trip. More on that in my report.)

I looked for scaled bark, trying to pay attention to the details Mark has taught me in the field.  As a long time reader of the Project Coyote blog, I read many of Mark’s descriptions of scaling, and looked at his photographs. But having him explain scaling in the field, spending several minutes at a tree with fresh scaling, increased my understanding by at least two orders of magnitude. Mark brought to life the importance of scaling as evidence for ivorybills occupying or using the area. But I also learned that Mark has an eye for “seeing” scaling, and in my previous trips I never spotted “good” scaling before Mark did. (It’s just a matter of practice.) On this trip, I did see some tree top scaling in a sweet gum, and I saw a few downed logs (recently downed) with scaling that might have been done by ivorybills (but which also could have been done by other species). I was conscious that I tried harder looking for scaling at some times, and less hard at other times – it’s a skill that needs to be learned, and I’m still at the bottom of the learning curve.

I saw many Pileated Woodpeckers over the week, and on the first day, I noted that I saw 4 pileateds while I was standing in one spot, more or less simultaneously.

Great Blue Herons (and other species) always seemed to be aware of me, when I was walking (even walking slowly/quietly), long before I was aware of them. By contrast, when I was standing or sitting still (especially when in a shadow, but even when in the sun), birds and other animals would sometimes approach quite close, and go on about whatever they were doing, clearly not yet aware that I was present. And sometimes, even once they became aware I was present, their behavior was still reserved and they lingered at closer range than the birds (or pigs, or deer, etc.) that became aware of me as I was walking.

Some observations under the latter conditions come to mind: (1) After a large limb broke off from a tree, crashing to the ground with an impressive disruption of the quiet, two pileateds flew to a cypress tree near where I was standing quietly. The first pileated flew to the top of the cypress and drummed a couple of times. The second pileated flew to the trunk of the cypress to investigate one of two cavities, one right above the other. The pileated stuck its bill and just a bit of its head into the cavity when suddenly a gray squirrel exploded from the cavity, driving the pileated away.  The squirrel clung to the cypress just a foot or so from the cavity, chattering loudly for a few seconds before retreating back into the cavity.

(2) I was sitting with my back against a birch tree, watching a fresh, asymmetrical (but small) cavity in a cypress tree across a creek (mostly taking a break in the heat of the afternoon), when a Hermit Thrush approached from a nearby shrub. The thrush moved closer (to within perhaps 15′), then off to my right, and then back in front of me, before finally moving slowly off and out of view.

(3) Eating lunch on a log one day, a Yellow-bellied Sapsucker suddenly appeared in my peripheral vision, seeming to fly right at my head, before veering off at the last second to perch on a large trunk about 12′ from me. I’d been sitting quietly (the bird might have thought I was a stump?), but seemed to recognize I was not part of the landscape when it veered off to perch and start tending its sap wells. I was able to grab my camera and take a couple photos while it was at close range, the bird never flushing as when they are startled, but rather simply moving gradually higher up the tree and out of view.

A couple of random thoughts based on my field notes: I flushed wood ducks about 3 or 4 times, and always thought it would be impossible to confuse a Wood Duck for an ivorybill. Even one time when I noted that “the ID was a little tricky”; the situation was that I wondered for a split second “what was that?”, and not “could that have been an ivorybill?”. I observed two (rather small, I think) Cottonmouths; both were well behaved and non-aggressive.  Very beautiful snakes.

And one other observation: while standing quietly in a shadow, I saw a large bird, darkish in color, mostly obsucred by a tangle of vines, fly in to a log on the ground. I could not see the bird, and thought it was on the opposite side of the log from me, and there was much undergrowth that made visibility difficult. I heard several loud (very loud) raps, interpaced with quiet, and based on my time in the woods, I thought pretty sure this was a large woodpecker, foraging on a downed log, and occasionly delivering 3 to 6 heavy blows to the wood. The bird continued foraging in this manner, with several sequences of loud knocks, and I finally decided to move to my left to try to get a better angle on the log. I heard another couple sequences of raps and then quiet, and I was pleased I hadn’t started the bird and caused it to flush. I moved to my left, and a little closer to the log, and then there was a downed tree blocking my path, and some water, and I had to make some noise to get around the obstacle, and continue moving to try to see the area around the downed log better.

By this time, it was clear that I had flushed the bird, and did not see or hear it any more.  I’ve thought about this event, and it emphasizes to me that birds may often be close enough to see, but impossible to see because of vegetatation blocking the view, and that birds we often think of being “in the shrubs” or higher “in the trees” are often on or near the ground. If I had to guess, the bird was either a Pileated Woodpecker or a Northern Flicker.  I’ll never know.

I started writing this note with the intention of providing a simple summary of my observations during the week I was in Louisiana, but quickly realized I was describing a more general sense of purpose and the idea that looking for ivorybills is distinctly different from looking for other birds.  I could add some good search hours to the effort – that was worthwhile and enjoyable to me, and although I’m uncertain how my hours contribute to the Project Coyote overall effort, I am very pleased to be part of the team.

photos follow . . .

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First morning: Wolf Spider, possibly Tigrosa helluo.

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Cottonmouth (fairly small, less than 2′ long; it saw me before I saw it).

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A slug on a branch where I suspended my backpack for a morning break.

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I suspect this otherwise healthy looking tree has some parasite or other infectious agent causing blisters in the bark.

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I looked for large, asymmetric cavities; these are probably too small (but it’s difficult to judge size; the cavities were often 80′ or higher above ground).

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Recent rains had swollen water bodies and washed leaf litter and other debris off the forest floor; and made even very shallow ditches treacherously slippery.  And… it was difficult to find places to cross small streams and sloughs.

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Raccoon prints in the mud.

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Recently dead trees are of interest because they may attract woodpeckers; and a very large, powerful woodpecker might be indicated if tightly held bark is stripped away in large flakes, a feat difficult for smaller woodpeckers to perform.

 

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I’ve included several photos of logs used to cross deep water; as an indication of how it’s difficult to move efficiently through the forest.  What’s not seen, is how far I had to walk to find a suitable log to cross, and all the logs I rejected.

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The branch at right possibly shows scaling; the kind of clue that we look for that may indicate foraging by ivorybills. (The tree is a sweet gum, and there was additional scaling on it the following week.)

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I believe all these are Red-eared Sliders.

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Red-eared Slider.

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These appear to be twigs stripped of bark and left on the bank; either because I startled a beaver, or because whatever animal was accumulating these was waiting for a future time to retrieve the wood.

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Unidentified fish.

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Zebra Swallowtail.

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For whatever reason, I seem to notice scaling on fallen trees more than on trunks and/or limbs overhead; this appeared to be a fairly recently felled tree, with bark scaling.

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The other side of the tree trunk above.

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And at the end of the fallen tree, was this “tall stump” that also appeared recently damaged, and with recent bark scaling.

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Examining the scaling closely, I think I see where the tip of a woodpecker’s bill has struck a dead blow into the wood.

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It took me several minutes to clear the flotsam off this tree so that I could cross it.

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Another tree crossed the same afternoon.

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And another crossed that afternoon (it was my longest haul out of the woods).

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I believe in the middle background is a sweet gum, that has forked, and then rejoined itself…

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… like the eye of a needle.

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The most common woodpecker I saw was Yellow-bellied Sapsucker.  It was useful to try to photograph bird species, to practice that skill, just in case (the majority of my bird photos are poor).

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Red-headed Woodpecker.

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The stump of this fire-damaged tree completely burned, while the adjacent trees were undamaged.

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I would spend long minutes, just sitting or standing and watching open areas; hoping to re-create the situation described by other observers of ivorybills.

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Cavity that is not too large, and not too asymmetrical.

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More cavities that are … interesting.

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Brown Thrasher.

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This photo re-creates where my hand was about to grab onto a Devil’s Walking Stick just before I saw the thorns.  I was about to descend a muddy/slippery shallow ditch – this is the only Devil’s Walking Stick I saw during the week.

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Yellow-bellied Sapsucker.

 

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Another fire-damaged tree, loblolly pine (I think); again without fire spreading to any adjacent trees.

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Large, asymmetric cavity photographed maybe 200′ distant and across a water body.

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Cottonmouth.

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A large irregular cavity on the underside of a limb in a Sycamore; in my recent visits, we’ve never discussed Sycamores as a tree susceptible to scaling or which might have cavities.

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Pipevine Swallowtail.

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Another cavity photographed at a distance.

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And one more cavity; it seemed larger to me in the field, but this photograph makes it look small and symmetrical.

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I had to walk a long way to find this log to cross, and the photograph doesn’t show, but it was a bit of a scramble from the end of the log up onto the bank.

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A series of 3 (older) symmetric cavities in a cypress, with a fresh (irregular) cavity above.  I watched the upper cavity for 1/2 hour or more, never seeing anything go in or out.

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There are lots of challenges in walking about the forest besides water crossings; briers, tangles, thickets, holes to step in, mud, spider webs, fallen logs; forgetting to mark my vehicle on my GPS in the morning; GPS batteries run down, etc.  The logs were easy to photograph and maybe give a sense of the challenges.

 


Trip Report: January 25-30, 2018

From January 25-30, Stephen Pagans and Erik Hendrickson and I searched in the vicinity of Joseph Saucier’s October sighting. I’ll begin with a day-by-day log accompanied by some photographs, followed by a discussion of our observations and what they may imply, with photographs from our last day in the field. I’ll end with some or Erik’s photos. They help convey the experience of being in the field more effectively than most of mine. This is an image heavy post, so I hope you’ll take the time to look at and enjoy the pictures.

We had no possible sightings or auditory encounters and devoted most of our time to surveying. We did a few ADK series, sometimes followed by Erik’s tooting on a baritone sax mouthpiece, the best imitation of the Singer Tract kents I’ve heard.

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Mark Michaels in Background, Double Knocking with Cypress Dowels. Stephen Pagans at right.  Photo by Erik Hendrickson

There were no apparent responses. Scaling consistent with what’s described for ivorybill was abundant in most areas visited. Large and possibly suggestive cavities were also relatively easy to find. This contrasts with the primary search area, where cavities of any size are difficult to locate. This may be due to the ~30% lower canopy at this location.

We covered between 4 and 5 miles most days. For the most part, we tried to avoid repeating the same tracks. We saw substantial flocks of Rusty Blackbirds on a couple of occasions. We didn’t encounter many mammals – an armadillo, a rabbit, and some glimpses of hogs. We found little beaver sign but didn’t get into the area where we understand beavers are most abundant.

 

We spent the 25th and 26th in the immediate vicinity of the sighting. The habitat in this area is extensive and impressive, as it was in most places we visited. We found considerably more scaling on this trip than on the last one, as well as more cavities. As mentioned previously, the cypress in this area was not heavily logged, so many large trees remain, not all of them as obviously undesirable as the ones shown.

 

 

Suggestive Scaling and Cavities Found January 25 and 26, 2018. Scaled tree species include sweet gum, honey locust, and sugarberry.

The 27th was a rainout. We spent that morning birding from the road around a nearby lake. I went to Alexandria for a brief visit to the annual meeting of the Louisiana Ornithological Society.

On the 28th, which was cloudy and drizzly, we went to a different nearby location. Again, we found some decent or better habitat, a good deal of bark scaling, and other indications of woodpecker activity, including a cavity resembling an ivorybill roost in an unpublished image from the Singer Tract. By late morning, we reached an area of much younger forest, so we turned back.

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One of the cavities strongly resembled one of Tanner’s unpublished images of an ivorybill roost.

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Ivory-billed Woodpecker Roost in Dead Ash, Courtesy of the Division of Rare and Manuscript Collections, Cornell University Library

On the 29th, we visited a different area, also nearby. The habitat was again impressive, but we only found one recently and extensively scaled sweet gum with very large chips at the base and an unusual bit of excavation on the edge of a scaled part of the trunk. An area that we could not reach appeared to contain even more mature forest and probably merits a visit in future.

 

On the 30th, we found another entry point. About two miles into the woods, we found more sweet gum scaling than I’ve seen in a single day, approaching or surpassing the quantity found during the most productive weeks in our main search area. Again, we found a number of potentially interesting cavities, new and old, including one in a cottonwood snag that had been extensively stripped of bark, this along the edge of an old logging road. We guessed that this concentration of scaling was in a patch of around 100 acres, but we were unable to explore it fully, so we can’t be sure how extensive it might be.

With the passage of time, I’m even more struck by the extraordinary nature of what we found on the 30th.

Some Comments on the Scaling and Cavities

As noted, I was impressed by the abundance of scaling found in the vicinity of the sighting and even more so in the concentration found on the 30th. The latter was truly unprecedented in my experience. As was the case in Tanner’s day, sweet gums with dying crowns are the primary target. The work found is consistent with that shown and described by Tanner. More on sweet gums below.

Additional work was found on honey locust, sugarberry, American elm, and cottonwood. Bark on all of these species (possibly excluding cottonwood which has high adhesion values and bark strength) becomes easy to remove fairly rapidly after death, and none of the scaling approached what I’d consider possibly diagnostic for ivorybill (again perhaps excluding the cottonwood). Still, the quantity of it may be significant.

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Scaled cottonwood snag with large cavity. While this snag is longer dead than some, the scaling is not recent. Cottonwood bark shares properties with hickory and probably adheres more tightly for longer than the bark of many other species, including sweet gum.

We found no scaling on oaks. (The same has been true in the main search area, except in 2012-2013.) Steve suggested this may be due to the fact that the forest is relatively young, so the oaks are still healthy.

The sweet gum scaling was mostly found in clusters, with the notable exception of the single tree found on the 29th. This may be due to the pattern of sweet gum die-off, but we did visit areas with unscaled, dead and dying gums.

The sweet gum scaling ranged from old to very fresh, probably a year or two to a day or two. All trees were recently dead, with twigs and sometimes gum balls and leaves attached. Much of it was extensive, involving larger limbs and sometimes main trunks. Bark chips ranged from very small and consistent with what I’d expect for PIWO, to larger strips that I’ve also tended to ascribe to PIWO, to much larger chunks that I think are considerably less likely to be Pileated.

 

Regarding the sweet gum scaling in general, I have only found a similar quantity and quality of scaling on this species in our main search area and at this location. Scaling in the old Project Coyote search area was on a wider variety of species, with only a little on sweet gums. I never saw anything like this in over two weeks in Congaree or in briefer visits to other areas. The Carlisles, who are searching in the Pascagoula area, have found at most a similar looking example or two over several seasons, and Paul McCaslin, one of the earliest Project Coyote team members recently sent me a note reading: “I am still amazed, every time, at the scaling pics you send from the tops of those sweetgum trees. I am an ISA Certified Arborist and spend a lot of time looking up at trees and I NEVER see anything even close up on my neck of the woods.”

To cut to the chase – if Ivory-billed Woodpeckers are not present and this work is being done by Pileateds, then I don’t think either quantity or apparent quality of bark scaling on sweet gums can be treated as a reliable indicator of ivorybill presence.

 

With regard to other tree species, I still think that the work on hickories found in the main search area is likely diagnostic. Work on live or very recently dead honey locusts (like the one in some of the old trail cam photos), cottonwoods, sugarberries (one example found in in the old search area) and oaks (one or two examples found in the old search area and several found in the new one in 2012-2013) may be as well.  Though I’ve grown increasingly cautious about sweet gums, the concepts discussed in the post entitled Bark: An Exegesis still hold.

Some Closing Thoughts

Though I have now spent multiple days in this area without any possible ivorybill contacts, I remain very impressed by the habitat and continue to think the initial report is highly credible. The scaling is abundant and suggestive, as are the cavities. However, the extensiveness is daunting, and I don’t see a way for a small, self-funded group to search it effectively. In the current search area, we have the benefits of compactness and known, readily accessible locations where there have been frequent possible contacts over a period of years. I think there’s a good possibility that ivorybills are present in the vicinity of Joseph’s sighting, and there’s sufficient habitat to make detection very difficult. I’m at a loss as to how to find them (without an infusion of J.J. Kuhn’s skills as a ‘woodsman’), if indeed any are there.

Here are some of Erik’s photos for your enjoyment.

 

 


Trip Report: December 27, 2017 – January 1, 2018 and Some New Year’s Appreciations

I returned to the main Project Coyote search area where I spent December 27-January 1. I was joined by two new team members – Erik Hendrickson, an excellent birder and retired National Park Service engineer who had an ivorybill sighting in Arkansas back in 2005, and Jay Tischendorf, a veterinarian with a long and adventure-filled background as a field biologist. Erik lives in Colorado, so he may not be able to visit often, but Jay is much closer. I hope that both of them will be able to return and bring their considerable skills to the effort.

Stephen Pagans, who has been with Project Coyote since 2012, was in the area for the duration. Steve is a retired forester, avid birder with a great ear, and an outstanding photographer. This portrait of a feral hog (more on hogs later), which I think is award-worthy, is just one example of his work.

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Feral Hog Photographed by Stephen Pagans

Tom Foti made it down from Arkansas for a day. Spending time in the woods with Tom, whose knowledge of bottomland forests is second to none, is always an education. On this trip, Tom pointed out that I’d been mistaken about the hickories in the search area. I believed that they were all bitternut hickories (Carya cordiformis), except for a very few shagbarks (Carya ovata), but it turns out that many, perhaps the majority, are in fact pignut hickories (Carya glabra). One of these, shown below, has a DBH of 42″ and may be a state champion. Tom also identified a nutmeg hickory (Carya myristicaeformis), an uncommon species that may not have been previously recorded in the parish.

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Jay Tischendorf beside a potential champion pignut hickory

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Nutmeg Hickory Photo by Erik Hendrickson.

Having such great companions for the week caused me to look back at the past year, with its terrible low points – the losses of Frank and Bill Pulliam – and high points, particularly the March recordings, which I think are among the strongest evidence of ivorybill persistence obtained to date, and to appreciate my friends, collaborators, and outside advisors. Although I’ve been the public face of Project Coyote for years (Frank wanted it that way), this has always been a team effort, although the composition of the group has shifted over time. While it would be cumbersome to name everyone involved and some frequent advisers prefer to remain anonymous, there are several, in addition to those mentioned above, whom I’d like to acknowledge publicly.

On more than one occasion over the years, Bob Ford has lifted my spirits when they most needed lifting. When I talked to Bob shortly before Frank’s death, I was despondent. I knew Frank’s prognosis was not good and was having doubts about carrying on. Bob helped me see a way forward, reminding me that the search area is important, ivorybills or no ivorybills, and that I’d done meaningful work related to its ecology in general.

Matt Courtman, who had some involvement early on and had known Frank for several years, reached out shortly after Frank died, giving me much needed moral and intellectual support and breathing new life into Project Coyote. In one of those odd coincidences, Matt’s New York relatives knew and did business with my father decades ago.

Philip Vanbergen, the youngest among us, had the presence of mind to turn on his recording device on March 11 and capture a couple of calls, setting the stage for his and Matt’s return on the 15th when the much longer recordings were made. Phil has also been responsible for our trail cams since 2016. His energy, enthusiasm, and interest in the natural history of the area are invaluable.

Peggy Shrum’s ideas, background studying raptors in the Peruvian rainforest (a considerably more challenging environment), and familiarity with tropical Campephilus double knocks are great assets. Peggy has made the long trip from South Carolina to participate several times, and it’s always a pleasure to have her along.

Tommy Michot and Wylie Barrow from Lafayette have also been great sources of support. Though Tommy is a retired biologist with a Ph.D, I admire his youthful enthusiasm, open-mindedness, enjoyment of the woods, and his sense of humor. To top it off, he’s also an accomplished traditional Cajun musician from an illustrious musical family.  Wylie and Tommy have known each other for years, and while Wylie has seldom been able to make it into the field, his careful, scientific approach and probing questions help keep me on track. While I skipped it on this most recent trip, the lunches I have with Wylie and Tommy (and sometimes Phil) in Lafayette on the way home invariably help me absorb and evaluate whatever I’ve observed or experienced while searching.

Professor Fredrik Bryntesson has been a great online friend and supporter. He has shared details from his research into some arcane aspects of ivorybill history, some of which have found their way onto the blog. I hope we get to meet in person and that he will be able to visit our search area sometime soon.

Finally, Patricia Johnson, my wife – Patricia comes along from time to time, holds down the house when she stays at home. Her moral and morale support sustain me.

Though 2017 was difficult, I’m grateful to be surrounded by such great collaborators. I’m hoping for more highs and fewer lows in the year ahead . . . Without further ado, here’s the trip report. As with the previous one, I’ve opted not to do a day-by-day log. There’s not all that much to report.

The weather this trip ranged from cloudy, dreary, and damp to bitterly cold; there was little sunshine, except on January 1st, and avian activity was generally low throughout. Woodpeckers, except for Red-headeds, were mostly quieter and less active than usual. Nevertheless, on at least one day, we saw or heard all seven species (ivorybill excluded) that are found in the area at this time of year.

Birds may not have been very active, but the hogs certainly were. We saw upwards of 15-20 on a couple of days, and signs of their rooting were everywhere. Their numbers seem to have increased considerably since 2012, despite the presence of at least a few dedicated hunters in the area. We ran across these newborn hogs and assumed their mother had been shot. Their cute appearance belies their destructive potential should they survive. IMGP5639

We did not have any possible ivorybill encounters and found little recent bark scaling, except on two or three sweet gums,  some extensive work on a pine, and a small patch on a cypress. Some commentary below the images.

Phil solved the problem with the trail cams, and we now have three deployed on hickories – two that have lost their tops and one that is in obvious decline. We’ll deploy the fourth in the spring when it will be easier to locate unhealthy trees. Given what we’ve observed and the life cycle of the beetles involved, I think scaling on hickories is most likely to take place between mid to late spring and fall.

IMGP5580IMGP5583Fresh scaling on the bole and branches of a recently uprooted sweet gum. Some of the bark chips were large and consistent with what I would expect for Ivory-billed Woodpecker.

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Extensive, recent scaling on medium and large sweet gum limbs.

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Recent scaling on large sweet gum limb. Photo by Stephen Pagans

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Extensive scaling on a freshly dead pine top (needles still attached).

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Scaling, targeted woodpecker dig, and insect galleries on a beaver-killed cypress.

With regard to the sweet gum scaling, it is far and away the most abundant form of this work we’ve found, and this has been true year after year. It is considerably more common in the Project Coyote search area than in other places I’ve visited or than in the Pascagoula, based on the Carlisles’ efforts there. It also matches the work described by Tanner as being typical of ivorybill, but as discussed in my post entitled Bark: An Exegesis, sweet gum bark is relatively easy to scale, making it more difficult to exclude Pileated Woodpecker. As an aside, I’m puzzled by the fact that we found a good deal of scaling on oaks in 2012-2013 and have seen virtually none since then.

While I’ve written previously that I think pine has no potential for being a diagnostic because it is easily scaled, the example above impressed me for its extensiveness and the fact that the presence of needles suggests the tree died very recently. Lighting conditions in the field were so poor that it was impossible to see that scattered patches of bark remained. This only became apparent when I brightened the photographs. Even so, the extensiveness so soon after death remains impressive.

I’ve included the beaver-killed cypress scaling here not because I think it’s likely ivorybill work; it could be, but the bark was loose, and the scaled area, while contiguous, covered only a modest percentage of the bole. What may be significant is the presence of insect work of a kind that is suggestive of suitable ivorybill prey. Tanner thought that cypress-tupelo swamps were poor habitats for the ivorybill, presumably because both are long-lived and relatively insect-resistant species and perhaps because he rarely ran across large scale deadenings of those species. The example shown here leads me to wonder about this assumption, particularly in places where beavers are present or other disturbances occur; fire, to which water tupelos are apparently vulnerable, for example. While Allen and Kellogg reported that Florida ivorybills nested in cypress and fed nearby on fire damaged pines, I think it’s possible that food sources would be sufficient in cypress-tupelo swamps under certain conditions. This relates, at least indirectly, to issues that have been addressed in the “Bits and Pieces” series. Stay tuned for the final installment.


Change of Pace, Change of Place: Trip Report and Sighting Follow-Up, November 16-21, 2017

On October 22nd, I received an email reporting a recent ivorybill sighting in eastern Louisiana. I found the report convincing for its high level of detail and decided to devote my next trip to following up on it. The source was Joseph Tyler Saucier, a pastor, avid hunter, and Louisiana native whom I’ve known virtually since early 2014, when he wrote and expressed his interest in Project Coyote. We exchanged a few emails at that time, but he was in more frequent contact with Frank. I have no doubt about his honesty.

When I asked him if I could post his entire report, with location details redacted, he courageously volunteered to attach his name to the sighting.  In addition to the initial report, I’m including some further comments he made when I shared my impressions of the area and asked if I could include his description in the post. His words should speak for themselves.

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I was a friend of Frank and talked to him on a few occasions about my own experiences with the IBWO. I saw a lone male when I was about 14 years old on my grandfathers property in West Central Louisiana. After many years of searching without success, I became a IBWO agnostic/ skeptic. I’m an avid hunter and the last two years I had pretty much given up on even thinking about the bird. Saturday morning that changed. I went on a annual squirrel hunting trip over the weekend . . . the birds presence there it never crossed my mind. On Saturday at approximately 9:30 am I was in pursuit of a squirrel . . . in a section of large trees. I saw through some brush a black animal with white stripes slowly making its way up the truck of a large tree. My first thought, was it was a black squirrel with white marks on it which would be the kill of a lifetime. I had killed a black squirrel the previous afternoon. My second thought, as the animal became more visible was that it was a skunk with white stripes somehow climbing up the bottom of the tree. Then suddenly, the bird came into better view and into the sunlight. I first noticed that it wasn’t climbing the tree slowly but was hoping or bobbing up the tree. I noticed the two clear stripes coming down from the neck to the lower back. When I reached for my phone in my front pocket the bird quickly turned its head in my direction. At that moment, I noticed the most startling thing I’ve ever seen. The bill on the bird was solid white. The sun illuminated its radiance as it stuck out against the dark bark of the tree. I noticed a black underdeveloped crest. Judging by the size and underdevelopment of the crest it was a fledgling. Suddenly, the bird flew to my right then ascended upwards and swung to my left where the bird was met in the air by a larger woodpecker without any red on its crest. The soaring birds quickly were no longer visible. I did not get the best view of them flying off because I was obstructed by trees and brush. I believe once again and have no doubt about what I saw. I know I won’t be taken seriously but do you think I should contact anyone . . . about this sighting?

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Thank you for your steadfastness and detailed report. I wish I could have gone assisted you guys on the search. Unfortunately, a number of things required my attention. Mark you can use my name or report as you wish. I’m certain that I viewed at least one IBWO. I’ve typically hunted once or twice a week for about 17 years and I see Pileated Woodpeckers nearly every outing. I know the difference. A large Woodpecker with two white stripes, a long ivory bill, and a solid black crest stood out. Certainly, some will roll their eyes or be dismissive of my sighting. I’ve simply shared what I saw and the experience itself helped heal this doubting Thomas.

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Steve Pagans and I visited the vicinity between November 16-21, spending a total of five days in the field and covering just over 23 miles. We had no possible sightings but heard what I’d describe as a weak possible single knock on the afternoon of the 21st. Because we were talking at the time, and there were some hunters in the vicinity, gunshot is a distinct possibility. I did not find the kinds of feeding sign I’ve suggested may be diagnostic for ivorybill; however, we did find several concentrations of bark scaling involving a variety of tree species. I usually post my trip reports as day-by-day logs, but since this involves a new area, I’ll take a different approach to summarizing our observations.

Habitat Characteristics

The area is part of a large parcel of bottomland hardwoods, much of it maturing second growth. Forest composition more closely resembles the old Project Coyote search area than the new one; Nuttall oaks, honey locusts, and pecans, which are absent from the new search area, are abundant. Overall, the forest is more mature than in the old search area, with many trees between 2′-3′ DBH, and some oaks and gums exceeding that in the most mature sections.

I have the impression that the harvest of cypresses from the area was limited. We only saw a couple of old stumps, and many seemingly healthy, large trees can be found, including the largest ones I’ve ever seen.

The woods are breathtakingly beautiful, and if ivorybills have persisted, I think the habitat is adequate to support them.

 

 

 

Woodpeckers and Nuthatches

Pileateds, Red-bellieds, Hairies, Downies, Flickers, and Yellow-bellied Sapsuckers were abundant, and impressionistically, there were many more Sapsuckers than in the current Project Coyote search area. By contrast, Red-headed Woodpeckers were scarce; we only heard three over five days. We encountered no White-breated Nuthatches (which are very common in our current search area) or Red-breasted Nuthatches and got no responses to playbacks of both species. Playback of the (putative ivorybill) March calls sometimes provoked apparent reactions from Red-bellied and Pileated Woodpeckers and from Red-shouldered Hawks.

Cavities

Finding cavities can be challenging, especially when the canopy is high, leaves have not all fallen, and the mid-story is thick. In addition, Pileated Woodpecker cavities vary considerably, and there are no data on the dimensions of ivorybill roosts. All we know is that ivorybill nests tend to be larger and more irregularly shaped than Pileated nests. It seems reasonable to infer that the same would apply to roosts. While cavities may not be strong indicators of presence, it’s still worth looking for outliers. We found two on this trip, one in a honey locust (which has harder wood than most oak species) and one in an American elm.

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Large cavity in a honey locust snag

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Large cavity in an American elm

Feeding Sign

As noted, we did not find any feeding sign that matches the diagnostic criteria I’ve hypothesized for ivorybill work. We did, however, find a decent quantity of bark scaling. Our field impression was that bark scaling was not as abundant as it is in our main search area, but on reviewing the photographs I took over five days, I’m doubting that impression.

We found bark scaling, some fresh some older, on a number of species – honey locust, sweet gum, red maple, persimmon (old and not photographed), and sassafras (not photographed and consistent with PIWO scaling on the species that I’ve found locally). The bark of small red maples is easy to scale, so this work too could well be Pileated.

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In the area where we found the cavity in a honey locust, there appeared to have been a substantial die-off of that species, and several snags had scaling on the upper branches and boles. Honey locust bark is very hard and tight when the tree is alive and shortly after death, but it softens, loosens and becomes easy to remove, as was the case of the snag shown below. Examination revealed that the snag shown below was infested with termites, making PIWO the likely culprit, at least with regard to the most recent work.

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There was scaling, both old and new, on a number of recently dead honey locusts in the vicinity.

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The bark remained hard and very tight on the recently downed locust shown below; however, the appearance and extent of the scaling are suggestive of Pileated. Squirrel is also possible, although there were signs of insect infestation.

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Sweet gum scaling was also abundant. Most of it was on higher branches and involved small limbs. The largest limb is shown in the first image below. Most of the chips were small, and all of the work strikes me as being within the range of what’s physically possible for Pileated. There was a time when some of this work would have excited me more. Nevertheless, the fact that bark scaling is abundant in the area is encouraging, since Pileated Woodpeckers scale bark relatively infrequently.  In addition, scaling is likely to be less abundant at this time of year, when other food sources are readily available.

 

 

Snakes

I always enjoy including herp photos when the opportunity presents itself. Steve nearly stepped on the rattlesnake, the biggest I’ve ever seen. I was glad to be wearing snake boots. The eastern ribbon and garter were mesmerizing.

 

 

Some Closing Thoughts

The forest is extensive. We focused on the vicinity of Joseph’s sighting, coming in from several different directions.  Many acres remain to be explored. We found little beaver sign but understand that beavers are abundant in nearby, much less accessible patches of similarly mature forest. Hunters frequent the area, but as in many other patches of potential ivorybill habitat, signs of human activity – litter, shotgun shells, flagging – diminish the farther one goes from existing ATV trails.

While Steve and I didn’t see or hear anything strongly suggestive of ivorybill, I was very pleasantly surprised by the quality of the habitat. I came away convinced that this area merits further attention, and that would be the case even without Joseph’s report. There is far more such habitat in Louisiana than most casual followers of the ivorybill saga imagine, and while I plan to remain focused on the current Project Coyote search area, I will do my best to give this area the attention it deserves.


Trip Report: October 17-23, 2017

The first trip of the season was relatively uneventful, although we heard possible single and double knocks on Thursday morning and afternoon. Unusually heavy hunting activity and bad weather kept us out of the field on Saturday the 22nd and most of the Sunday the 23rd. Peggy Rardin Shrum joined me from Tuesday through Friday.  Tommy Michot was with us Tuesday, Wednesday, and Thursday, and Steve Pagans joined us Wednesday through Friday.

Tommy has been very good at encouraging us all to do more stopping and listening. My focus on looking for feeding sign has probably led me to do more walking than I should.  We’ve also started experimenting with playback of a couple of the March calls, cleaned up, amplified and looped by Phil Vanbergen and would like to offer it other searchers for their use. Feel free to email me for an MP3 if you’re unable to pull it from the site.

The amplification and cleaning up highlights the differences between many of our sounds and those recorded in the Singer Tract (though I still think the species involved is the same). Agitation and disturbance may account for the shorter, sharper sound of the John’s Bayou calls, and as has been discussed in prior posts, written descriptions of the calls, including Tanner’s, point to a good deal of variation.

We observed that playback of these calls often provoked responses from woodpeckers of all kinds at close to the same level as Barred Owl playbacks, though this was impressionistic not quantified. Crows and raptors sometimes seemed to react as well. I played around with some other sounds chosen more or less at random – Goldfinch, Blue Jay, Ring-billed Gull, Black-backed Woodpecker. None of these seemed to have much effect, though the Black-backed did appear to evoke a smaller number of woodpecker reactions.

Water levels were low enough to enable us to get into some of the less accessible areas, but the need to  deal with our trail cams prevented us from spending a lot of time exploring. There were no indications of woodpecker activity on the target trees, and we continue to have problems with camera malfunctions. Two of the four we had deployed seem to have failed since June; one of these may have been damaged by a tree fall, but both cams have the same issue – shutting down after booting up. We’re trying to identify the glitch and determine whether the cameras are reparable.

Tuesday, October 17

We visited the northern sector to check on our two northernmost camera deployments. The first of these (now discontinued) was a standing hickory with signs of insect damage. Tommy and Phil Vanbergen had changed out the batteries in August, and 64% of the charge remained. The second target is a hickory about 200 yards away that had lost its top in a spring storm and an adjoining beech that had also been damaged. Since August, a large hickory had fallen, bringing down a number of limbs from other trees in the process and perhaps damaging the camera without hitting directly. In addition, a large fallen oak limb obscured most of the trunk of the main target. We pulled the camera when we discovered the apparent malfunction. On the return hike, we headed east to a part of the area I had not previously explored and that has had little coverage.

Wednesday, October 18

On the morning of the 18th, I stopped for breakfast at the place closest to our search area.  Early on weekday mornings, it’s a hangout for law enforcement officers and older folks, as well as various people passing through on their way to work. A sheriff’s deputy and a couple of older men had been in the place on Tuesday, discussing local history. All three were familiar faces, as no doubt, I was to them.

For the first time, this particular bunch engaged me in conversation, asking whether I was hunting. I said no, I was looking for birds and taking pictures. They asked what ‘what kind of birds’, and I said woodpeckers. “What kind of woodpeckers?” “Rare ones”, I replied. They initially thought I was referring to “itty bitty ones”, Red-cockadeds, but I explained that I meant big woodpeckers. “You mean those Indian Hens” (meaning Pileated), one asked. I told them what I was looking for was similar but not the same and took the opportunity to show them pictures from my iBird Pro app.

The Deputy Sheriff and one of the men recognized the Pileated but said they’d never seen an ivorybill. The third guy pointed to the ivorybill image, and said, “I used to see them when I was hunting over on . . . but I gave up hunting seven years ago.” This is the second or third local claim I’ve heard from this area, which is several miles away from the focus of our efforts across a major highway.  It looks decent on Google Earth. While I’ve been wary of engaging in too much conversation with locals, it sometimes provides interesting intel, and this evolved organically; I didn’t reveal our location; and I hope it won’t result in too much gossip.

I met up with Tommy and Peggy, and we went to the southern sector to check on the other camera deployment (another tall hickory stub) to discover that one of the two cameras had failed in the same manner as the one at the northern location. We changed the batteries on the functioning camera and pulled the malfunctioning one. We met up with Steve, who had arrived later and followed another route, in the early afternoon and hiked out with him.

Thursday, October 19th

Peggy, Tommy, and I devoted the morning in the northern sector, exploring the less-visited eastern side. At approximately 8:35 we did a series of double knocks, which did not produce any immediate responses. We remained in place, and shortly before 9, we heard several single and double knocks from south of our location.  We were not recording at the time, and I considered them to be moderate possibles. We met up with Steve, who had been some distance north of us, about an hour later; he had heard our ADKs but not the apparent responses.

In late morning, we headed west and moved the functioning trail cam to the nearby hickory/beech blowdown. This is where Peggy, Tommy, Phil, and I had heard some knocks in June. It took a group effort, but we were able to move the large oak limb that was obstructing the view of the hickory bole. We redeployed the camera, trained on the bole. Given the season, it seems unlikely that this stub will be scaled in the next several months, but I anticipate leaving these camera traps in place for an extended period.

We stayed in this spot for lunch and did a little more exploring in the immediate vicinity before heading back toward the trailhead in the early afternoon.  At approximately 2 pm, as we were approaching the spot where the March recordings were made, we heard several ambient knocks, also moderate possibles, but were unable to generate any responses.

There was more shooting than usual in the area during this trip and there were distant industrial noises from time to time. These were all easy to distinguish from the possible SKs and DKs.

Friday, October 20th

Peggy, Steve, and I returned to the same vicinity and spent our time in the less visited eastern half, some of which was familiar to Steve. In addition to be being hard to reach, the terrain in this area is difficult, making it more difficult to explore.

We did not see or hear anything of note, although I found some suggestive older scaling on boles – one example on a sweet gum and one on the dead side of a still live hickory. I’d estimate that this work is at least a year old. The hickory work is of the kind I think may be diagnostic for ivorybill, and the sweet gum work is interesting for being on the bole and also for apparent large exit tunnels. I also find the excavation on the hickory to be of potential interest. The wood does not appear to be soft, and the digging does not look like typical Pileated Woodpecker work. In a couple of instances, Tanner mentioned how Ivory-billed Woodpecker work resembles that of the Red-bellied Woodpecker except for appearing to have been done by a larger animal. This hickory excavation may fall into that category.

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Old scaling on sweet gum bole

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Scaled hickory bole with unusual excavation

Saturday, October 21

I met Peggy at the breakfast place, which was unusually busy and filled with hunters. It became clear that I had not picked the best time to be in Louisiana, as this was a big hunting weekend. In addition, the weather forecast called for heavy rain by late morning. Peggy had a long drive ahead, and we agreed that there would be little point in going into the field. She left for home, and I opted to drive around, specifically to see if I could find any easy access point for searching in the vicinity that local people had mentioned and also to scout other nearby areas for potential. I had very limited success, getting a look at part of the bottom, which looked like it might have potential at a cursory glance.

The rains came on Saturday night and continued through Sunday morning.

Sunday, October 22

The rains kept me out of the field until noon, at which time I went to the eastern sector and and spent about three wet and unpleasant hours there. It rained sporadically, avian activity was generally low, and visibility was poor due to cloud cover. I didn’t see or hear anything of interest.

On Monday, I awoke to an email with a very detailed account of a sighting by someone I’ve known for several years. I may devote my next trip to following up on this report and to looking at areas in another part of the state. In any event, the next post will likely be the final in the series that this one has interrupted.