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.
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.
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.
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.
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.
I also spotted this unusual, large and rectangular cavity in a cypress.
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:
- 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.
- 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).
- 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.)
- Diameter of the scaled bole or limb. Bigger is better. So are boles.
- 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.
- 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.
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.
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.
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.)
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.
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.
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.
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.
I have one or two more trips planned this season and am hopeful that they will generate some new insights.
1967 slides taken by Neal Wright of a putative Ivory-billed Woodpecker in Texas are viewable on Vireo (search Ivory-billed Woodpecker), but high resolution scans have not been widely circulated as far as I know. These images were not made public until after the the Arkansas “rediscovery”, more than three decades after they were obtained. Wright’s story is mentioned in Jackson (2004) “Reynard saw the photo and said that it was fuzzy but definitely of a Campephilus woodpecker.” It’s clear from the context that Jackson had not seen the images at the time of writing.
When I first encountered the Wright slides, I was skeptical, but after seeing some lesser-known Singer Tract photographs as well as other images of Campephilus woodpeckers in cavities, my opinion started to shift. After finding additional ivorybill photographs in the Cornell archives and in Tanner’s dissertation, I thought it would be worth posting some of those images along with one of Wright’s slides for the sake of comparison.
Of course, it’s up to readers to draw their own conclusions, but I think a few things are worthy of note. First, the Wright slides were taken long before the internet, at a time when the only readily available image of an ivorybill in a nest cavity was Tanner’s Plate 1, which is quite similar to Fig. 43b (below). The posture of Wright’s bird is much closer to the ones shown in the then virtually unknown and/or unpublished images, especially those from the 1938 nest. The placement of the cavity is also strikingly similar, just below a major fork. It seems highly unlikely that Wright would have been aware of obscure Singer Tract photographs.
While the image quality is too poor to be certain, there appears to be excavation similar to work found on some Singer Tract nest and roost trees to the right of the nest cavity in Wright’s slide. Again, this is a fine detail that would likely have been unknown to Wright and that would have been difficult to fabricate.
These are very poor quality images; the malar stripe seems a little too extensive, although this could easily be a function of angle and lighting. As with the Fielding Lewis photographs, which were taken several years later, I have to wonder why anyone intent on committing a hoax wouldn’t do a better job. And in the case of the Wright pictures, it would make more sense if the template for such a hoax would have been Plate 1 in Tanner, rather than photos that were unknown to all but a handful of people, most of them at a northeastern university.
Finally, I think the fact that the images were turned over to an ornithologist (George Reynard, scroll down for his obituary) but were kept confidential for so long also tends to support the idea that they’re authentic. Neal Wright may have had an agenda – a desire to protect the area where he took the picture – but the images were not used to serve that purpose.
Edited to add: This fascinating article on a recent, non-ivorybill related hoax suggests that it’s not uncommon for hoaxes to be paradoxically uneven in quality, and that hoaxers’ motives can be murky and bizarre. Nonetheless, I think that other factors point to authenticity for both the Wright and Lewis photos.
Another item I found in Tanner’s dissertation merits comparison with one of Project Coyote’s camera trap photos, since the tree species involved are the same. Plate 7 in Tanner shows ivorybill feeding sign on honey locusts, but the reproduction in the monograph is very dark. The figure from the dissertation is much brighter, making it clearer what Tanner was attempting to show. I think the similarity to the work on our target tree, where I had a sighting a week prior to the capture, is striking.
To enlarge the trail cam photo, click here.
To expand on some of the data included toward the end of the March trip report (which is worth reading in in conjunction with this post), I thought it would be informative to provide a season by season and sector by sector breakdown of the scaling I and others involved with Project Coyote have found since the spring of 2012. To do so, I’ve gone through my notes and photographs and have done my best to reconstruct the data collected. While not complete (I’m quite sure a good deal more scaling was found in Sector 3 during 2013-2014, for example), I think this breakdown is a fairly accurate reflection of what we’ve found over the years.
As discussed in previous posts, I think extensive scaling on hickory boles is the most compelling for Ivory-billed Woodpecker. Bark on this species is thick, dense, and usually remains very tight for a long time. Extensive scaling on sweet gum boles and oaks (upper boles and large branches) is second among work that I’ve found. Work on small boles, and higher and smaller branches is somewhat less compelling and is more significant for its abundance. Some of the high branch scaling and work on smaller boled sweet gums may well have been done by Pileated Woodpeckers (and possibly by Hairy Woodpeckers), but the abundance, the presence of large bark chips in many cases, the way it appears in clusters, and the fact that Pileateds scale infrequently suggest a different source for much of it.
I have excluded all work where squirrels are suspected but have counted one tree, a hickory found this year, on which the work could well have been that of a Hairy Woodpecker. Hairies do forage for Cerambycid beetles just under the bark, but they’re only capable of removing tight bark in small pieces; their work on hickories is perhaps more accurately described as excavation through the bark.
The trail cam images toward the end of this post are the best we have (out of many thousands of hours of coverage) showing how these species forage on suspected ivorybill feeding trees.
All trees were live or recently dead (twigs and sometimes leaves attached). All scaling was on live or recently dead wood.
Sweet Gum (Liquidambar styracifula)
Sector 1: 46
Sector 2: 8
Sector 3: 51
~15% had scaling on boles (a few of these were large trees). The majority of work was on crowns, including larger branches. Fallen trees were included when woodpecker involvement was evident and bark was tight.
Bitternut Hickory (Carya cordiformis)
Sector 1: 3
Sector 2: 4
Sector 3: 7
All trees were standing; scaling was on boles and was very extensive (the tree shown on the homepage is one example) with one exception from this year . Insect tunnels were visible in all examples. An additional hickory with a modest amount of high branch scaling was found in Sector 1 this year but was not counted for this analysis.
Oak (Quercus) spp.
Sector 1: 1
Sector 2: 4
Sector 3: 0
All oaks had scaling on large branches; one also had some on the bole. All oaks in Sector 2 were found in a single cluster.
We have some information on forest composition in Sector 3, and it appears that sweet gums make up approximately 19%, oaks upwards of 35%, and hickories somewhere under 10%. Sectors 1 and 2 may differ and be more varied in overall composition.
The overwhelming preference for sweet gums relative to their abundance stands out. The scaled oaks are a mix of species, one Nuttall’s, one willow, the others unidentified.
In Sector 3, I am treating the compact stretch from the location of Frank Wiley’s sighting last spring/downed sweet gum top where we had the camera trap to just south of our current deployment as a cluster. The estimate of 23 trees being found in this area is conservative. I have only found one instance of recent scaling north of the location of the downed limb/Frank’s 2015 sighting. The main cluster has been in the same vicinity this year and last, with additional work scattered around farther south. Two of the hickories are within 30 yards of each other, approximately half a mile from the cluster, and one was on the edge of the concentration.
It also may be significant to note that we found a cluster of old but intriguing cavities in the same vicinity as the Sector 3 concentration in 2013-2014. Most of these seem to have fallen. The difficulty we’re having finding active, suggestive cavities is vexing, and may be the most compelling reason to be skeptical about the presence of ivorybills in the area. At the same time, finding Pileated cavities is difficult, even in defended home ranges.
I’m treating Sector 1 as a single concentration; the vast majority of the work is on a natural levee where sweet gums are abundant. The entire area is considerably larger than the other clusters, but given the abundance and ease with which we’ve found sign there over the last five seasons, I think it constitutes one area of concentration.
In Sector 2, there was a small cluster in the area where I recorded putative kent calls in 2013, with work found in 2012 (spring and fall) and 2013. Because the area is small with open sight lines, I can be confident there has been no recent work there since late in 2013 (I last passed through it with Tom Foti back in March of this year.)
The sweet gum work Tom and I found on that day was perhaps half a mile north of this cluster, within 100 yards of the hickory on the homepage. The other hickories found in the 2013 and 2014 seasons were not far away, no more than 500 yards apart as the crow flies.
There’s obviously some bias here, since there’s a relationship between finding feeding sign in a given area and spending time there. Nevertheless, I have little doubt that the putative ivorybill work tends to be clustered. I also have little doubt about the strong preference for sweet gums, since I’m not looking at tree species when I look for scaling. The degree to which sweet gums are favored has only become clear over the last year or so.
Frank pointed out this data does not reflect most of the scaling that likely exists in relatively close proximity to the Sector 3 cluster but cannot be quantified because it is in an area we have intermittently visited due to inaccessibility. Only two or three examples are from this area, which has been visited a handful of times.
I don’t expect to return to our search area until sometime this fall, but I hope that my schedule will allow me to spend a lot more time in the field next season. Overall, this was a challenging week due to high temperatures and severe back pain that troubled me from the end of the first day on. Nonetheless, it was a productive trip, and weather conditions were generally tolerable – hot and humid but not unbearably so, with daytime temperatures mostly in the high 80s. Woodpeckers, except for Red-bellieds, were generally quiet and unobtrusive. The only Pileateds I saw were responding to playbacks, and while I didn’t keep count, I’d estimate I heard their vocalizations an average of 2 or 3 times a day.
In contrast to winter and early spring, the woods are filled with other sounds – songbirds, frogs, cicadas, squirrels – making it much harder to separate signal from noise. Green frog calls can sound a little like double knocks at a distance, especially if you’re walking, and the squirrel calls in this recording were intriguing enough to capture, as only the somewhat kent-like sounds were audible to me in the field, something for other searchers to bear in mind.
I had a 6 am flight out of JFK. After arriving in New Orleans, I met Frank Wiley for coffee and then drove to his house, changed clothes and got to the search area at a little after 2 pm. The area I visited is the one closest to a parish road. This is a part of the southern sector in which we’ve consistently found feeding sign since 2012 and where I found a number of recently scaled trees in March of this year. Despite full leaf out, I was able to find quite a few more recently scaled trees in the general vicinity of those discussed in the most recent trip report.
Unfortunately, and perhaps because my attention was on looking for feeding sign, I got somewhat turned around and wandered considerably farther south than I had intended, running the risk not only of trespassing but also of getting stranded in the woods. I noticed this at about 6 pm. Fortunately, I wasn’t too far from the road, just well south of where I wanted to be. It took me a half hour to reach the road (at which point I noticed my back was hurting badly) and another ten minutes or so to get to the car. I didn’t sleep much or well that night, despite having been awake since 3:30 am.
My back continued to bother me, so I tried to take it easy by spending the morning in the most accessible part of the search area. I found a few additional scaled trees, some with old work and excavation that seems consistent with what Tanner described, others with scaling that looked fresh.
Travis Lux, a radio freelancer working on an ivorybill story, spent the morning in the field with me. (Most days this week I could only manage being out from around 6 am – 1 pm.) We visited the northern sector. I did not find any new feeding trees.
We passed the large downed limb where we had a camera trap for some time, and there has been no fresh work on it since the flooding in March. And only a small quantity of bark has been removed since the camera was deployed.
This may be significant, since it seems likely that common animals with small home ranges would return repeatedly to the same feeding spot. In the case of this limb, it seems to have been scaled by something unknown, prior to our camera deployment and again a little over a month later. Squirrels, Red-bellied, and Pileated Woodpeckers were captured or seen on the target limbs, but they did no scaling. As I’ve mentioned previously, in most instances, we’re finding that trees are visited by whatever’s scaling them once or sporadically over a period of months.
We continued southward into the area discussed in the last trip report; we’ve found feeding sign regularly in this small area every season since 2013-2014. I did not find any new feeding trees: however, there was additional scaling on a couple of the trees found in recent trips, most notably the large dying sweet gum below (the next to last image in the post). I’m hoping that Frank will be able to train a camera on this treetop once our old Reconyxes have been repaired. The resolution on our other cameras is too poor to aim them so high; the same may be true of the Reconyx cams, but the quality is somewhat better.
We did a stake out in the area for a couple of hours but did not see or hear anything of interest. On the way out, I noticed that one of our suspected feeding trees had some very fresh scaling on it. This is a small tree with thin bark, and the chips were mostly very small. I do not suspect this to be ivorybill work and have a hunch that it was done by a Hairy, taking advantage of scaling that had been begun by another species.
I returned to the part our search area that’s most readily accessible from the road, so I was in the woods before sunrise. I found a few additional recently scaled trees, some with very large chips at the base. One of these was heavily scaled on the bole as well as on the branches, and although the bark was loose in some spots; it was tight in others. The presence of twigs and small branches suggests that it had died fairly recently, even though there were signs of Pileated Woodpecker excavation on decaying parts of the bole.
Phil and Eric Vanbergen joined me, and we returned to the area I’d visited the day before, again getting into the woods early. We found a six more scaled trees, took GPS points, and measurements. The trees were all live or fairly freshly dead. All were sweet gums, as has been the case for virtually all trees found this season (with two possible exceptions, one of which is shown in the May 22nd entry). Diameters of the trees measured were 14.7”, 19”, 21”, 25.1”, 26.2”, and 27”
Four of the six trees listed above were found in pairs, about 5’ apart in one instance and 20’ apart in the other. In the case of one pair, a long dead sweet gum and a live hickory within 30’ also showed some older scaling. Most of this work was recent but not fresh. We found large chips at the base of the pair of trees that are 5’ feet apart; these were probably a few months old.
While I did not keep count, and we only took coordinates for a few of the trees found this time around, I’d estimate I found a total of 15-18 recently scaled sweet gums in and around the southern concentration described in the last trip report.
The Vanbergens were along again. It’s refreshing to spend time in the woods with young people (Phil’s in college and Eric’s in high school) who know and love nature, something that seems to interest fewer and fewer people in their age group. They have suggested some interesting strategies for searching, and I’m looking forward to their participation next season.
We went to the northern area, arriving at the scaling concentration at around 7:30. We staked out feeding trees until around 10 with no results.
Here are some of Eric’s wonderful photos: cottonmouth, pale lobelia, bark scaling, swamp milkweed, and another cottonmouth. He identified the plants.
After that we headed further south to an area they hadn’t visited before. We found a little bit of fairly recent scaling on a dead hickory about 20 yards from where I found a heavily scaled hickory in 2013. The scaling is not extensive; it’s clearly targeted at larger Cerambycids, but given the small patches, Hairy Woodpecker is a distinct possibility. I was unable to find any fresh chips, so the work is probably several months old.
I returned to the northern area alone and spent the morning staking out the same large feeding tree. I watched Red-bellied Woodpeckers flying to and from the tree sporadically, usually spending very brief periods pecking and gleaning on both scaled and unscaled areas and drumming from time to time. At 7:30, the male landed at the top of scaled stub and called. The female arrived; they copulated, and she flew off. He departed a few seconds later. At 8:30, I recorded the squirrel calls, and at 10:35, one of the RBWOs landed near the top of the scaled stub, peered around at me, and eventually started to drum. I called it a day shortly after noon. Here’s another image of the sweet gum top I was staking out, to give a sense of how extensively scaled it is in the crown.
I hiked out, following a rather circuitous route. A few hundred yards from the concentration, I found a recently dead sweet gum with a few small scaled patches but no extensive work. I think this is another indication that this scaling is not being done by a common, evenly distributed species. Work tends to appear in bunches, with scattered sporadic examples elsewhere, but in the two areas discussed in this post, bark scaling on deciduous trees has been abundant in concentrated locations, over several years, and is much harder to find and scattered outside of these “hot zones”.
On the 24th, I drove to New Orleans, stopping in Lafayette for lunch and ivorybill talk with Wylie Barrow and Tommy Michot.
I realize this has been a very image-heavy post. I sometimes think it’s hard to convey the quantity and unusual nature of the bark scaling we’re finding in this area and hope this does a somewhat more effective job at making it clear than some previous efforts.
That’s all for this season. I’ll be doing some additional posts on old material as well as one on foraging sign concentrations and tree species in the weeks ahead. I may also upload a lot more images of feeding sign to Flickr for those (if any) who haven’t seen enough of it. And of course, if there’s anything to report from Louisiana, you’ll read it here. I hope that the insights and data that have emerged this season will guide us next year.
As usual, much of this report will be focused on bark scaling. I found an unprecedented amount of fresh work this trip, a total of 29 trees, all sweet gums. I only counted live and freshly dead trees that appeared to have been scaled within the last year, and probably more recently than that, in most cases. As will be discussed, I was able to ascertain that 11 of these trees had been worked on no earlier than March 15th. I was selective about what I included in the count, relying on my years of experience looking at scaling and how its appearance changes over time and this passage from Tanner for the criteria:
Ivory bill sign shows as bare places on recently dead limbs and trees, where bark has been scaled off clean and to a considerable extent. Pileateds do some scaling too, but it is usually confined to smaller limbs and those longer dead. Freshness of the sign can be judged by any appearance of weathering, which will soon turn bare wood a grayish color. Extensive scaling of the bark from a tree which has died so recently that the bark is still tight, with a brownish or reddish color to the exposed wood showing that the work is fresh, is one good indication of the presence of ivorybills.
We had a number of visitors during my stay. Tom Foti joined me again on Tuesday and Wednesday, and Phil and Eric Vanbergen came along on Friday. I appreciate the Vanbergens’ help in collecting the data I’ll be discussing. It’s great to have such enthusiastic young people involved. Meanwhile, John Williams (Motiheal from ibwo.net) visited and spent four days in the field with Frank. Both John and Frank are planning to provide their own accounts, and those will be posted in the weeks ahead.
A general note about the week, leaf out progressed rapidly, and the change between Sunday the 20th and Saturday the 26th was dramatic. Nonetheless, I was able to find a good deal of feeding sign later in the week.
I arrived on the evening of Saturday, March 19th, and Frank and I spent the 20th in the northern sector. There had been severe flooding in the area earlier in the week; the waters had receded – we suspect by the 15th or 16th and certainly no earlier than the 15th. One of our trail cams, placed about 4’ above the ground, was completely overtopped, ruining the card and probably the camera as well. Such floods are exceedingly rare, perhaps a once in 500 year occurrence in the area. Fortunately, flooding tends to recede rapidly, but crossing both permanent and seasonal water bodies remained a much bigger challenge due to deep water and slick banks. The most stunning aspect of the flooding was the near total scouring of leaf litter in many parts of the search area, leaving bare soil and deposited silt visible. The landscape was transformed, and familiar spots looked radically different.
Frank often describes walking through the forest on dry leaf litter as “walking on cornflakes.” The absence of leaf litter limits the noise made by walking. This may be advantageous between now and late fall. Unfortunately, I anticipate being able to visit the area only once more before summer, probably in June.
The flooding had another benefit this trip. The absence of leaf litter makes it much easier to find fresh bark chips on the ground and to determine with some degree of certainty when scaling has taken place. The flood waters receded no earlier than March 15, so all fresh chips found below trees where the leaf litter had been scoured were no more than a week old.
When we reached the vicinity of the downed top, first discussed here, we heard a loud single knock. Frank’s initial reaction was that it might have been a gunshot, but we both agreed that the sound seemed to have come from a nearby source; we heard no other shots that day and saw only one vehicle, almost 2 miles away. Later in the morning we heard a couple of weak possible double knocks and later a very good sounding one.
We also found a little bit of scaling just north of the northern concentration discussed below. While some of it looked to be quite fresh, we did not find any bark chips.
The scaling in the first of the above photographs is somewhat marginal, as only a single smaller upper limb is involved. While I’m unsure, I don’t think I counted either of these trees, as I only started keeping track later in the week; both examples came from very close to the northern cluster discussed below.
I was on alone on the 20th, and I returned to the same area. I found a good deal more scaling.
In many cases, the scaling shows sign of progressing from treetops down, as Tanner described.
The detail of the small tree, scaled down to where small branches are still in leaf, is at the edge of a small pond around or in which I found five other trees with recent scaling on them, as well as two more with older work (not counted).
There was new work on one of the trees I found last month, the larger one in the background, below. I found several other scaled trees in the immediate vicinity, including the one in the foreground, on which we’ve now deployed a camera, and much of that work was fresh too. I chose a spot for a stakeout and spent about an hour watching the treetops in this area of concentrated work. This location is 140 yards south of the small pond described above and is at the southern boundary of the cluster. During the stakeout, I heard a loud single knock that seemed to have come from the vicinity of the small pond.
As I was leaving, I passed the pond again and found what appeared to be new scaling on one of the trees at its edge. There were fresh chips in floating in the water at the base.
Tom Foti arrived on the morning of the 22nd. We spent the day in the one of the southern areas where we’ve found concentrations of bark scaling in past years and where there have been both possible visual and auditory encounters. We found several scaled trees in this area but did not see or hear anything.
I met up with Tom on the morning of the 23rd; I had decided overnight to be more methodical in my approach to documenting scaling. I’ve been so focused on what might be diagnostic that I haven’t attempted to quantify what I’ve found thus far and haven’t kept detailed location information. Thus, it seems like a good idea to start keeping better track. This should prove useful if we can document that ivorybills are present and that they are responsible for the bark removal.
Tom and I heard 6-8 likely kents at ~9:00 am, this at the downed top where we had the camera, the same location where Frank had his sighting last spring. The calls came from three directions, south, east, and west.
We headed south and met up with Frank and John in the core of the northern concentration, south of the pond. We did an extended playback series; John will have more to say about the specifics in his post. We all heard a nearby double knock during the playback; Tom, John, and I were sitting close together near the speaker and thought it was a single, but Frank, who was positioned closer to the source of the natural sound, called it as a double.
We found some very fresh bark chips (moist with sap) at the base of a 12” DBH dying sweet gum that has areas of scaling high on the bole. The tree (which is shown above) is only a few meters from the one found last month. We’ve deployed a camera aimed at this bole. Given the quantity of activity in the area and the evidence of return visits to feeding trees, we hope to get some hits before long.
We removed a piece of bark from a looser spot on a nearby downed tree (which had been fed on by woodpeckers both before and after it fell). Beneath the bark were Cerambycid larvae, pupae that I also suspect are also Cerambycids, and what I think may be a very young Elaterid larva. We placed some of these larvae and pupae on the piece of bark to illustrate. We suspect that Allen did the same for what became Plate 10 in Tanner.
On the way out and not far from the cluster, I spotted what appears to be the start of a large, irregularly shaped cavity. We’ll monitor this and see whether there’s any further excavation.
It rained heavily on the morning of the 24th. I spent part of the afternoon trying to take measurements but didn’t have much success, since I was using an ordinary tape measure.
On the 25th, Phil and Eric Vanbergen joined me and we took measurements in the two areas where there are concentrations of scaling, finding several more trees in the process. When I got back to Frank’s, the forester’s DBH measuring tape I ordered had arrived, making it possible for me to take measurements on my own.
I spent the 26th measuring suspected feeding trees in the southern area and found several more with recent work on them.
Except for feeding sign, I did not see or hear anything suggestive of ivorybills during my last three days in the area.
Now I’ll turn to some of the data I collected this week.
I counted 29 suspected recent feeding trees in the two areas, 13 in the northern sector and 16 in the southern. I did not count work that appeared to be more than a year old or work that was limited to very small branches.
The areas are 2.05 miles apart. The northern area was logged (probably partially) in 1905, although there may have been some later selective cutting. The southern area was logged in 1935. Forest composition is somewhat different between the two areas, with sweet gums seeming to be less predominant in the southern one. In the southern area, the scaled trees are in a narrow, almost linear strip with an area of .13 square miles/83.2 acres/33.67 hectares. The northern cluster is more compact and polygonal, with a total area of .03 square miles/19.2 acres/7.7 hectares. Within both areas, scaled trees were often found in groups of 2-6 – 11 out of 13 trees in the northern area and 11 out 16 in the southern. (This includes the cluster in and around the pond, which is perhaps 30 meters in diameter, but otherwise applies to trees that I estimated to be 20 meters apart or less.)
Scaled trees ranged from 6.5” dbh to over 5’ (estimated) for a gum with a split trunk, one stem live and the other dead. All but 3 inaccessible trees were measured.
76% of the trees were alive, sometimes just barely, with scaling on dead or nearly dead limbs or boles. There was scaling on live parts of one or possibly two of the trees.
Though we have found scaling on boles of larger trees in the past, all trees scaled on boles were 12” DBH or less. While these measurements may not be meaningful absent a random sampling of trees in each sector for comparison, I thought the numbers might be of some interest even now, especially in light of the recent discussion of Tanner:
This is obviously a very small sample, but I think it’s interesting nonetheless. The three smallest trees in the northern sector were all in or near a pond that appears to have had its outflow blocked in recent years. They probably died due to the change in hydrology. But for that difference, there seems to be an even greater favoring of 25-36” DBH trees than found by Tanner, and this is so even in the less mature southern sector (again without data on overall composition). This year, feeding sign has been found exclusively on sweet gums. We’ve found a few scaled oaks over the years and more bitternut hickories; I suspect the latter are being fed upon at a high rate relative to abundance. We’ve discussed doing some random sampling for tree size and species, but given our limited resources, this may not be worthwhile or feasible at present.
Of course, none of this proves that ivorybills are in our area, but I think it’s another indication that they are. The best-case scenario is that the dramatic increase in scaling this year and in this season is related to there being young in a nest or nests.
I flew into Houston on February 4 and arrived at the search area on the morning of the 5th. Frank’s work schedule had precluded him from returning to the search area during my absence, and he was unable to get time off to join me this trip.
Tommy Michot visited on the February 5th; we went to the northern sector, and passed the downed sweet gum top (actually a limb) found in April of last year. Project Coyote had a camera trained on it for some time but took it down due to equipment failure. The main stem, which reaches from the ground to about 20 feet up, had been scaled extensively, down to the base, over the course of the last month. Some of the work had been done no more than a few days prior to my arrival based on the condition of bark chips found at the base.
We have a camera back on this top but have low expectations, since so much bark has been removed that it makes a much easier target for other species of woodpecker. While I don’t believe in the “curse of the ivorybill”, individuals and small groups of self-funded searchers face enormous obstacles and are dependent on equipment that’s often unreliable.
Tommy and I measured a number of the largest trees in the area, and the biggest oaks and sweet gums are around 4’ DBH, with many more in the 3’ range. Here are some of the highlights: two Nuttall oaks: 137 cm/53.94”, 119 cm/46.85″; swamp chestnut oak 110 cm/43.31” four sweet gums: 124 cm/48.82”, 123 cm/48.43”, 110 cm/43.31″, 109 cm/42.91”.
While ours was not a random sample, this table from a 1986 paper by Tanner (on data collected in the Singer Tract in 1938), is interesting for the sake of comparison.
In his 1944 report on the Singer Tract, Richard Pough described sweet gums in the 5’-6’ DBH range as being characteristic of old growth conditions, and such trees were not uncommon in the 19th century. Impressionistically, at least, most of the ~4’ DBH sweet gums in our area are moribund and are likely to have lost their tops. I know of only one gum that appears to be in the 5′ DBH category. As of 2009, the national champion sweet gum had a DBH of 5’4.6″. The tree below could be close to that.
Many, perhaps most, gums have at least some beaver damage. This may be contributing to the earlier mortality, both by stressing the trees directly and by creating the opportunity for beetles to infest them. I have long suspected that the decline of the beaver could have contributed to the IBWO’s disappearance, since beavers directly damage trees by gnawing and also stress or kill them by altering hydrology.
Beavers were extirpated from much of Louisiana by the early 19th century. As of 1931, populations were restricted to the Amite and Comite rivers in the southeastern corner of the state; they were reintroduced in other areas in 1938 and had established themselves in 21 parishes as of 1951. (Wylie Barrow, pers. comm.) Range expansion continued into the 1990s and after. They’re now considered a pest animal and appear to be found in all parishes. A recent paper suggests that the introduction of beavers into Magellanic Woodpecker habitat may have benefitted that species.
I was on my own on February 6th, and I went and staked out the downed top for the better part of the morning. Nothing landed on it except for a Red-bellied Woodpecker that pecked and gleaned but did not scale bark or do any excavating. At approximately 9:30, I did a very aggressive series of ADKs. I heard a couple of loud single knocks that seemed to come from no more than a couple of hundred yards away and also a possible double knock. These came during a period when I was standing, moving around, and doing the ADKs, so I did not hear them very well. In addition, there were a few distant gunshots within about 15 minutes after the series, so I’m not very confident about what I heard. (These were the only shots heard all day.) I found some scaling the next day a couple of hundred yards away (discussed below). This gives me some reason to think the SKs were a reaction, not shots. Still I’d place these in the weak possible category.
One highlight of the day was watching a pair of Red-shouldered Hawks in the act of mating.
I returned to the same area on the 7th, with two cameras to deploy. One is aimed at a large sweet gum stub, about 20’ tall and well over 3’ DBH that I found last trip. The top had broken off shortly before my arrival. While it’s not discussed in Tanner, T. Gilbert Pearson, who was the first modern ornithologist to observe the Singer Tract IBWOs, described this type of “stump” as one of the species’ preferred feeding sites. This is a tree on which I found high branch scaling last year, before the top broke off. I expect this to be a long-term deployment.
I also redeployed a camera on the downed top, although we’re not very hopeful about that location, since the scaling is so extensive and the bark has been loosened in many of the remaining unscaled areas.
I walked south for a couple of hundred yards and found very fresh, large bark chips at the foot of a live sweet gum (there were two large gums ~3’ dbh about 10’ apart). There was extensive scaling on live or recently dead high branches of one or both of these trees. Because there had been a major rainstorm and accompanying minor flooding a week before and the chips were mud free, I can be sure the scaling took place after the rain, and since Tommy and I had spent considerable time in the area examining some other nearby scaling two days before, I strongly suspect this work was done on the 6th. I can’t help but wonder whether the possible single knocks came from whatever was doing the scaling; that would be consistent with my immediate impression when I heard them, both in terms of distance and direction. Nonetheless, my confidence level about the SKs is low given the gunfire.
I don’t think the scaling and bark chips are consistent with squirrel; the chips are large and thick and do not show signs of having been chewed off; the ones collected weighed over five pounds.
There was a little excavation and exit tunnel expansion (visible in the first image above) associated with the scaling; and it has the generally clean edges and lack of layered, flaked off appearance around the edges or on the chips. The leaves and gumballs are attached on most of the limbs, indicating that they’re alive or very, very recently dead, so the bark is almost certainly tight. This is about as good as it gets when up-close examination is not an option
I met Tom Foti, who came in from Arkansas, on the morning of the 8th. Winds were high, with gusts approaching 50 mph. We decided it would be unsafe to venture into the woods, so we drove around the edges of the search area looking at the surrounding upland forest, much of which is impressive and mature. Tom is very enthusiastic about the area, ivorybills or not, and we’re hopeful that steps will be taken to protect and manage it appropriately. The car ride was a running lesson on southern forest ecosystems, and as I told Tom, I’ll count myself lucky if I retain 10% of what I learned.
The next morning, the winds had dropped enough to make it safe to head for the swamps, and Tom and I visited the southern sector, an area where we haven’t spent much time lately. As mentioned in some previous posts, there has been a significant uptick in four-wheeler activity in the area, and it’s heartbreaking to see the destruction these callous individuals are causing. Fortunately, the damage is almost entirely limited to the periphery, and the deeper parts of the bottom are unscathed. The habitat types here are somewhat different, and the logging date is more recent, but it remains very impressive. We walked a long way and went to places I had never been, including a lower-lying flat with tree species I haven’t noticed elsewhere – shagbark hickory, bitter pecan, and overcup oak.
We saw no recent feeding sign in any of these areas, except for some older work on a small sweet gum that I described as being about a grade B-.
We then looped back along a different track, passing the spot where I recorded calls in March of 2013 and where we’d had a concentration of feeding sign in 2012 and 2013. We found nothing until we reached a location farther north that is within 100-200 yards of the tree shown on the homepage. Tom spotted a group of trees with bark scaling, some on boles and some on branches. Once again, this was not “grade A” work, but the concentration makes it more interesting than if it were one isolated example. We did not find any chips at the base of the snag that had been scaled on the bole, and the high branch work is not as extensive some.
It’s worth pointing out that on many days, I’ll walk for hours and see nothing and then find either a dramatic example of scaling or a small cluster of it. Tom and I had probably walked 3.5 miles or more before finding this little cluster.
I was on my own again on the 9th, and I opted to go on a death march to retrieve a trail cam from a tree deep in the swamp and proceed north from there. The tree is a large blown down sweetgum discussed and shown here. There was some fresh scaling on it that I suspect was done by a Pileated Woodpecker. There are nearly six weeks of images to go through, so it will take some time before we find out if there were any captures.
As on the previous day, I walked for a couple of hours without seeing or hearing anything suggestive until I got to a part of the area we haven’t visited since last year, perhaps a quarter mile south of the southernmost point Tommy and I had reached earlier in the week. I found old sign, some of which was fresh last winter and some of which was older. I then found some fresh work on two trees in close proximity to one another. Some of the scaling was on a downed tree but was clearly done by a woodpecker, with chips and other characteristics that I consider to be suggestive. Since the chips were caked with mud, the scaling was a little over a week old. The other work was on one high branch, but conditions made it impossible to look for chips.
On the return hike, I found what I’m quite sure is Pileated Woodpecker work on a recently dead or dying hickory. Since we’ve found a number of hickories that we suspect have been scaled by Ivory-billed Woodpeckers, this was an unusual opportunity to do a direct comparison. In my view the work on hickories is the most compelling for ivorybill due to the density and tightness of the bark and the hardness of the wood. There are pronounced differences in the presumed Pileated and suspected ivorybill work on this species.
The work on the homepage is suspected ivorybill. It is extensive, with huge contiguous areas, perhaps 20% of the entire surface, completely stripped, with evidence of bill strikes targeted at exit tunnels. The Pileated work is spotty by comparison. The bark chunks scaled from the tree on the homepage were large, dense, and thick, and there were no pieces of sapwood among them. By contrast, the suspected Pileated work involves very small pieces of bark that appear to have been removed by digging rather than scaling; there were also a few pieces of punky wood among the chips.
The next morning, I drove to the Wetlands and Aquatic Research Center (formerly the National Wetlands Research Center) in Lafayette and met with Wylie Barrow, Heather Baldwin, Tommy Michot, and Philip and Eric Vanbergen. (Two young enthusiasts who will be helping us out.) Frank joined us briefly, and then Wylie, Tommy, the Vanbergens, and I went out to lunch. It was an exciting and thought-provoking day, and the Research Center is an incredible facility. Wylie and Heather shared their comprehensive and in-depth analysis of conditions in the Singer Tract in Tanner’s day. They’ve amassed an array of materials encompassing land records, Civil War era maps, and stereographic aerial photographs. Their research far surpasses my own speculative effort. It covers the finest details – roads, improved and unimproved, snag densities, tree mortality, conditions around roost and nest sites, as well as conditions in other locations where ivorybills were seen. Tom Foti has done complementary research on hydrology, soils, and vegetation.
Their presentation convinced me that I’ve been too hard on Tanner in some respects. There was a little more old growth in the Singer Tract than I had inferred from the Pough report and some of the historical documents. Nonetheless, the characterization of the Tract as a whole as “virgin” forest is somewhat misleading, since over a quarter of it was second growth, and some of it fairly young. Heather and Wylie have graciously given me permission to summarize some of their findings.
When Tanner began his study, 72% of the Singer Tract was old growth. (Tanner estimated it at over 80%.) Logging in 1938 reduced that percentage to 67%. The ridges, which Tanner deemed to be the best ivorybill habitat, were actually the least likely areas to be old growth. (Tom Foti’s analysis also points to a preference for higher, drier locations.) The regrowth percentages for each landform in Tanner’s day are as follows:
Low ridge (23%)
Total on ridges (32%)
Low flat (4%)
Cypress brake (4.5%)
For the most part, the second growth forests were not particularly old, as has been suggested in previous posts. According to Heather, most of these areas only started to regrow in the 1880s and 1890s, “due to consecutive depressions and low cotton prices”. Thus, parts of the Singer Tract were relatively young second growth, and this included one of the ivorybill home ranges and one that Tanner deemed to be “best” – Mack’s Bayou.
The nature of the habitat in the Mack’s Bayou area is immediately apparent from the 1938 aerial photos, which suggest forest conditions that are present in many parts of Louisiana today. Nevertheless, Ivory-billed Woodpeckers nested there in 1934 and 1935, at minimum, and did so successfully at least once. This fact alone refutes the idea that Ivory-billed Woodpeckers are old growth dependent. Heather informs me that there was an abundance of dead and dying trees on the eastern side of the Mack’s Bayou range, due to a fire caused by logging activities. In any event, the home range Tanner delineated in this primarily second growth area is no larger than the home range he delineated around John’s Bayou, which had more mature forest. In fact, the area he designated as “best” for ivorybills around Mack’s Bayou was slightly smaller than its older equivalent near John’s Bayou.
Tanner knew that a significant portion of the Mack’s Bayou home range was not old growth, since his 1941 map shows “old fields” in the heart of it. He seems to have been unaware of the resurgence of cotton growing during the 1870s and 1880s, so he may have overestimated the age of the forest on that basis. I can’t help but wonder if he glossed over the conditions in the Mack’s Bayou range in part for the sake of protecting the Singer Tract and (as Heather suggested) in part based on what he deemed to be best for the birds from a conservation standpoint, an approach that later ossified into a categorical set of beliefs about old-growth dependence.
As I and others have been arguing for years, extensive forest cover, sufficient dead and dying wood, and enough large trees for roosting and nesting are probably the main requirements, even if old growth or near-old growth conditions are optimal.
I plan to return to the search area in late March and have another post or two in mind in the interim.
I made the mistake of trying to save on flights (actually paid with miles this trip), flying out of LaGuardia and a change of planes in Dallas. I left New York with a bad cold, and the first leg of the trip was miserable. Little did I know that the second leg would be worse.
At 4:45 pm, fifteen minutes before boarding time in Dallas, my flight to Louisiana was still listed as “on time”, although there had already been a gate change. There were five or six more over the next couple of hours, and American Airlines personnel at the various gates were either willfully dishonest or utterly clueless. The flight finally boarded at around 7 pm. We left the gate and sat on the runway for an extended period. At one point, the pilot announced that some planes were turning back, but that our crew could remain on the runaway until 1:30 am.
The pilot turned out to be wrong, as regulations now forbid planes from sitting on the tarmac for more than 3 hours. Somewhere around 9:30, we headed back to the gate. It took a while to find cooperative personnel, but I was able to rebook my flight for noon the next day. Sick as I was, I opted for a hotel rather than a night on a cot in the airport. I had to eat a room I had booked in Louisiana but used points to get this one. I got there a little before midnight and was in bed around 1 am.
I had planned to spend the 27th in the field, but that wasn’t happening. To the extent possible, I will avoid American Airlines and connecting flights in the future. Fortunately, my cold improved rapidly, and my rental car was a 4-wheel drive, which might have been a serendipitous result of the delay.
On the morning of the 28th, Brian Wiley and I went to an area that’s readily accessible from the road because we had plans to meet Tom Foti a little later in the morning. I spotted the downed sweetgum that we later found was being worked on, at least in part, by squirrels from the road. I found some recent scaling trees in this area, one where we’ve had possible sightings, concentrations of possible feeding sign, and auditory encounters in the past. While I can’t rule out squirrel work as a possibility, both of these trees were standing and somewhat longer dead than the downed trees that we now suspect are mostly being stripped of bark by squirrels; however, there was no way to find bark chips.
We met up with Tom at around 11 am, and we drove a few miles north to a location from which it’s easier to get into the mature bottomland areas. We spent the morning in this vicinity, where we’ve had a good deal of recent activity, but we did not see or hear anything of note.
I met Tom again the next morning, the 29th, and we covered a lot of ground, passing near a tree where we have a camera deployment (although we now suspect that much of the work was done by squirrels). We came upon another freshly stripped, downed sweet gum. Again, I now believe this to be squirrel work. (More on this in an upcoming post, but one indicator may be the presence of bark stripping on the underside of the limb at right.)
Tom headed back to Arkansas, and I headed back to Frank’s house. On the way, I passed the downed sweet gum that’s visible from the road and noted that there was fresh work on it. I went to examine it and noted that there was also some recently deposited scat.
I called Tom, and he turned around and met me. We collected the sample (which has a similar appearance to PIWO scat, although there was no urea, something that might point toward a mammal as the source). Despite the fact that we’ve documented squirrels stripping bark from this location, at over an inch long, this dropping was larger than and doesn’t resemble the images of squirrel scat found online. We are exploring the possibility of doing DNA testing on it . . . a very long shot indeed, but it may be worth a try.
Update, January 18: The consensus is that it’s not worth testing the scat.
Frank joined me on the 30th, along with Wylie Barrow and Tommy Michot, both great field people with a deep knowledge of bottomland forests and birds. They’re featured in Steinberg’s Stalking the Ghost Bird as leaders of “Team Elvis” south. It’s really amazing for laypeople like Frank and me to spend time with such experienced field biologists. Wylie probably knows more about the Singer Tract than anyone, and I’m looking forward to studying his materials on that subject. We didn’t see or hear anything of import, but I think it’s fair to say that Wylie and Tommy came away impressed with the habitat and thinking that ivorybill presence is at worst a possibility. Tommy took this photo of me crossing a log. He’s made of stronger stuff than I am and walked right across without hesitating.
I devoted the next day, 12/31, to staking out the downed sweet gum that proved to have been stripped of bark by squirrels. Nothing hit the tree for the entire day; it was cold, damp, and very uncomfortable, actually considerably more difficult than walking miles through the swamps. I did think I heard a single, pretty good double knock at around 3 pm, but I don’t trust that impression, given the fact that I was alone, tired, and hopeful.
On New Year’s Day, I left Frank to stake out the downed gum and went to retrieve a trail cam so we could monitor it remotely. While crossing an area of blowdown, I knocked myself down and nearly out, trying to break off the (not so) rotted limb of a downed tree.
I got the camera and met up with Frank. We then went to a location at the southern end of the search area that I had never visited before. Some of the habitat is very impressive, but there are many more signs of human activity (ATV tracks and empty beer cans in particular) than in some locations. We found some work on a downed sweet gum that we now think is almost certainly squirrel but did not see or hear anything else of interest.
On Saturday, the 2nd, I returned to the location I’d visited with Tom on the 28th; access is easy; it’s familiar; and it’s hard to get lost. I retrieved the card from the camera that’s trained on the downed sweet gum top I found in April. (The camera was unable to read the replacement card, so I ended up pulling it.) We’re unsure about whether the source of the scaling on this top is squirrel, as we’ve photographed them on it repeatedly over the past few months but have not documented them stripping bark. There was a little bit of fresh scaling on the tree (not enough to show up on the trail cam), and we suspect it to be Pileated Woodpecker not squirrel. Frank may replace this camera in the future.
I did not find any fresh feeding sign, but I did come across a sweet gum that had lost its top very recently, within days. I believe this to be a tree on which I photographed recent scaling last spring, and some of the fallen limbs had clearly been stripped before they fell. I found indications that a woodpecker or woodpeckers had worked on this limb at some point, as discussed in the previous post.
Perhaps the most significant event of the day occurred at around 11 am, when I heard an extended series of kent-like calls. At the time, I estimated the calling lasted for about 5 minutes, but I suspect it was closer to 15. These seemed to be coming from 200-300 years away, across a couple of challenging sloughs. There was really no way to try and follow them, especially alone. I did manage to record some of the calls on my DSLR (with no external mic). To my ears, they sounded pretty good, similar to the ones I recorded in March 2013, although they were all single notes, with no descending pairs. Unlike the 2013 calls (which were recorded on a better device at what seemed to be closer range), these came from a single, stationary source, not two moving ones. They were repeated considerably more frequently, and the pitch is slightly higher. Like the 2013 calls, they’re more clarinet than horn-like and don’t resemble the Singer Tract recordings in that regard.
In the attached audio clip (which may have lost some quality being transferred from .m4v to .m4a), the calls come at approximately, 4, 9, 17, 20, 25, 31, 39, 1:20, 1:27, 1:53, 2:07, and 2:17. I got the recorder running fairly late in the incident, and calls in the first minute of the clip are about as numerous as they were in the preceding minutes. They tapered off dramatically before ending at 2:17.
A variety of other birds are vocalizing throughout, including Blue Jays. I think the duration of the possible kents is shorter than the Blue Jay calls, but Blue Jay can’t be ruled out; I’m nowhere near as confident about these as I am about some others I’ve heard and/or recorded, including the 2o13 calls, but am posting them anyway. At around 3:41, Blue Jays start making an unusual call that we hear very frequently in this part of the search area. I do some playbacks of the Singer Tract recordings at around the same time, but there’s no evident response.
Per Frank, the dominant frequency of the calls is 1800 hz, with another bar at 2700. Since the calls are distant and the recording is poor, this might suggest a base frequency of around 900. The structure is more consistent with Blue Jay than known ivorybill. On the other hand, the duration is between Blue Jay and the ivorybills on the Singer Tract recordings. Allowing for attenuation by distance, this makes Blue Jay less likely.
Later that morning I did some additional playback and got apparent responses from Blue Jays and a White-breasted Nuthatch. This is the first time I can recall hearing a WBNU vocalization immediately after an IBWO playback.
On the evening of the 2nd, Frank and I went through the card and found the two sequences of a squirrel removing bark. Seeing the images was a bit of a blow, though not a total surprise; Wylie Barrow had raised this possibility a day or two before. He was the first person ever to make this suggestion; removing bark from hardwoods seems to be a fairly unusual and poorly understood behavior in squirrels; most of the information online suggests that it’s done on standing live trees when food is scarce, not on fallen ones when other food is abundant.
I shared the news with several biologists, and a couple of them pointed out that not all of the work we’ve found fits the squirrel paradigm. In fact, I think most of what we’ve ascribed to ivorybills is inconsistent with squirrel and am in the process of trying to identify some diagnostics. Unfortunately, since we know squirrels are doing at least some of the work on downed trees, an avenue that seemed very promising for camera trap deployment now seems far less so.
I returned home on the 3rd, and to my relief, the trip back was uneventful save for the usual post-holiday chaos at LaGuardia.
I plan to do a series of follow-up posts exploring scaling in more depth within the next week or two. I also hope to be able to provide some stills from the sequences we obtained.
This post will be something of a departure from previous ones in that we’re writing it jointly.
Though we met in 2008 and started calling our effort “Project Coyote” in early 2010, in many ways this week marks the 6th anniversary of our collaboration. It was the first time we visited the old search area together and everything grew from there. We’re an odd couple, with very different cultural backgrounds, personalities, and worldviews. There have been many strange ups and downs over the years but remarkably few major disagreements. One thing we’ve shared from the start is a similar approach to putting the pieces of this puzzle together – trying to glean what knowledge we can from those who were able to find ivorybills in the past, especially J.J. Kuhn. We think we’re on the cusp of obtaining something definitive for reasons that should become clearer in the post, if they aren’t already.
It’s remarkable that we’ve come this far. The obstacles involved in documenting the ivorybill are enormous. We’re just two individuals with limited time and resources searching in a fairly large, remote, and challenging patch. We have a small circle of supporters and trusted people who visit our area when time allows.
There are huge swathes of potential habitat in the southeast that get little human traffic, especially outside of hunting season, and many of these have not even been considered, let alone visited. It’s not uncommon for foreign (and some domestic) ornithologists to assume that conclusive imagery should have been obtained by now, just because it’s the US and birding is popular here and that extinction is likely because several organized searches have failed to come up with something definitive. Many American birders with little knowledge of or experience in the rural South jump to similar conclusions.
The mere fact that there have been formal, funded searches matters very little. The difficulties in obtaining documentation of an extremely rare, wary bird species that requires a large home range in secluded, difficult habitat are monumental. We think that camera traps are the most promising avenue for obtaining something conclusive (as is frequently the case with cryptic animals). The problem has been to place the cameras in a location that birds are likely to visit. This has been our approach from the start, but it’s only now that we think we’ve solved the problem. While we will continue to use other methods and to host visiting biologists and trusted supporters, camera traps will be our primary focus in the coming months.
On November 23, we were joined by Travis Lux, a freelance radio reporter who contacted us a few months ago and who has promised to keep our location confidential. We visited the downed sweet gum top discussed in several previous posts, most recently this one, and were elated to find that there was some new scaling at the top of the snag and decided that we’d return to Frank’s house to review the footage.
As soon as we looked at the data stored on the card, our elation turned to alarm and then almost to despair. Travis had been recording the whole day, and we’re sure this will make for some dramatic radio. Frank will pick up the narrative to explain.
Trying to understand what “goes wrong” with the various types of game cameras is a guessing game. Of the three cameras that we had deployed, two of them – upon reaching the 32 gb storage limit on the cards – began to overwrite the files rather than shut off automatically (as the instructions imply but do not directly state they should). The instruction manual was also misleading about the duration of a deployment based on the delay time set by the user. The instructions implied that a 32 gig card would not be completely full at the end of a 60 day deployment.
In reality, the card filled up after fifteen days. The camera continued to operate, but it overwrote the earliest files with the newest files, rendering the earlier files unrecoverable. With this hard learned bit of knowledge, I increased the time lapse to ten seconds, from five, and cut out about 45 minutes of “on” time at each end of the day.
According to the data gathered thus far and calculating data storage capacity vs. time deployed and time lapse setting, this SHOULD give us about 45 days with 50% battery and a fresh 32 gig card. The reprogrammed camera that we pulled the card on Mark’s last day in the field appeared to bear this finding out.
With very few exceptions, these cameras are manufactured and assembled in The People’s Republic of China. The instructions (and this has been true of several different brands we’ve tried) are generally translated from Cantonese or Mandarin…Poorly. Fractured syntax, and confusing usage of common words often leaves the guy programming the camera guessing what the instructions REALLY mean.
One of the cameras shut itself down for unknown reasons after taking just a few images. When checked, the batteries were still above 90%. I put a new card in it and conducted a 30 minute field test; it seemed to be functioning properly. Of the four cameras and three locations where we now have cams deployed, this one is in what we feel is the least likely to be visited by woodpeckers in the near future. Hopefully, the glitch will not reappear.
To add to Frank’s comments, unless one has well over $1000 to spend per unit, there are major tradeoffs involved in selecting trail cams. The brand we’ve selected stores individual frames as the equivalent of deinterlaced video stills. This allows for greater storage capacity and longer battery life but lower image quality, especially at a distance. Fortunately, all of our current deployments are at close enough range to produce a definitive image or series of images, and we now know that the cameras themselves do not scare off whatever is doing the scaling, something we thought possible in the past.
To return to the main topic, after the initial shock and disappointment wore off, we realized that there had in fact been relatively little scaling, except at the very top of the downed crown. The main trunk is almost untouched, and return visits remain a strong possibility. We have redeployed the camera and will leave it in place indefinitely.
Tuesday the 24th was a more encouraging day. We were joined by Tom Foti, formerly of the Arkansas Natural Heritage Committee and a member of the Ivory-billed Woodpecker Recovery Team’s Steering Committee. Tom is perhaps the foremost expert on bottomland hardwood ecology. He was very impressed with the habitat. He jokingly commented that if he were still with the Arkansas Natural Heritage Committee, he’d try encourage his state to annex the area.
While we were unable to show Tom any feeding sign, we did hear a couple of possible double knocks. In addition, we found a recently dead small sweet gum that had apparently been killed by ambrosia beetles, similar to others we’ve found, but as yet untouched.
While there’s no suggestive feeding sign in the immediate vicinity, the location is approximately a mile from the camera deployment discussed above and a few hundred yards from where we recorded an apparent double knock and obtained several intriguing game cam images. Given the absence of recent scaling in the immediate vicinity, we think this is the least promising of the three current locations.
We called it a day early because Tom had to return to Arkansas. What he saw and heard left him enthusiastic and eager to return. It’s a privilege to be around someone who’s so knowledgeable, and we look forward future visits and to learning from him.
If the 24th was a good day, the 25th was even better, though considerably more challenging. Brian, Frank’s son, came along and helped carry some of Frank’s gear. We went into an area that we’ve only visited once before. The area is approximately 1.5 miles from the nearest road, and as it turned out, we did that three mile round trip twice.
The habitat in this part of our patch is magnificent. There’s a good deal of old scaling high on live sweet gums. While this isn’t the type of work that we consider highly suggestive, it is consistent with what Tanner described and photographed (more on Tanner in Part 2).
We found a huge and recently downed (leaves attached) sweet gum, part of which fell between two recently dead saplings that both showed signs of ambrosia beetle infestation. Some of the scaling on the huge downed gum seems consistent with Pileated work (having a layered appearance), and some of it comes close to what we think is diagnostic for ivorybill. This is the first freshly dead tree we’ve found that has feeding sign suggestive of both species.
After finding the sign, we decided the location merited our deploying two cameras. (It would take four or five to cover the whole blowdown.) Brian and I hiked out to retrieve the two that Frank and Bob Ford deployed in October, while Frank went back to his house to get additional cards. We hiked back in and reached the location at around 3 pm.
Over the next hour, we heard several double and single knocks that seemed to be coming from no more than three hundred yards away. A couple of the double knocks were what we consider the best (most Campephilus-like) we’ve ever heard.
It was getting late, so we hiked out as quickly as we could, stopping to rest a little before sunset. As the sun was going down, there was a small burst of shooting from the direction of the road. A PIWO started scolding in apparent response, and Brian and I heard a sharp single knock from the direction of the bottom (away from the shooting) and more distant than the squalling pileated. (As an aside, Frank is a very experienced hunter and can easily distinguish between shots and knocks. It’s not difficult for me either, except when the sounds are obscured by crunching leaves, etc.)
We now have all four cameras deployed on recently dead trees or parts thereof that have a good chance of attracting woodpeckers in the near future. This along an approximately three mile line, with about a mile between each camera.
To be continued . . .
I’ll be posting Frank Wiley’s report on his recent visit to the Project Coyote Search Area in two parts. Below is his account of his first day in the field.
I was contacted last month by Bob Ford, a biologist with the USFWS in Tennessee, about a possible visit to the Project Coyote study area sometime in early October. After some back and forth, we agreed that the weekend of the 9th would be best for both of us. Bob has visited the area in an unofficial capacity on a couple of previous occasions; he is a skilled birder, with a Master’s Degree in Wildlife Science. His focus has always been on birds and bird-habitat relations, especially in bottomland hardwood environments. All that aside, Bob is a great guy to spend time with, and an all-around skilled woodsman. He arrived on the evening of the 8th, having spent the earlier part of the week fishing in South Louisiana with some of his colleagues with the USFWS.
October 9, 2015:
We arrived at the study area at dawn, shouldered our packs and entered the forest. This particular spot is in the northern sector, and provides the easiest access to the area that we informally call Jurassic Park from a road that passes through the surrounding uplands – thus cutting out over a mile of fairly difficult foot travel at the beginning and end of the day. We were barely out of sight of the truck when I heard a rapid ticking sound in the leaf litter near my feet. I thumped the ground with my walking stick and was rewarded when a Copperhead about 18” long moved due to the vibration. Only a moment before, it had been completely invisible, camouflaged by the surrounding leaf litter. We stopped for a few moments, took a few photos and left the little guy to go about his business.
We hiked a fairly difficult three quarters of a mile through the bottom, crossing several deeply incised sloughs and secondary creek channels. The area was extremely dry; there’s not been a significant rain event since early July, when a series of severe thunderstorms passed through. Stealth was impossible, the dry leaf litter making it sound like we were walking on Corn Flakes. We made it to the main channel, and walked beside it until I found the top of a sweet gum tree that had blown down during Mark Michaels’ last visit. (It had green leaves and no sign of insect infestation when it fell in April.) We had speculated that there was at least a decent chance that ambrosia beetles would infest the two main forks of this top over the summer, and hopefully attract large woodpeckers. The smaller of the two forks did not disappoint. Not only had it been infested with beetles and larvae, the bark had been stripped from 60% or more of the branch. The scaling, in all respects fit the very narrow set of parameters that Mark and I have come to believe can be considered diagnostic as the work of an Ivory-billed Woodpecker – that is, extensive scaling on a freshly dead/dying tree with very tight bark, large (silver dollar or larger sized) bark chips that have clearly been removed with one or more powerful strikes, and little or no damage to the underlying sapwood.
When Mark first spotted this top on April 21, we both felt it was important to get a camera to this location to watch for woodpeckers. With this in mind, I had brought one of our new “Plotwatcher Pro” HD time lapse video cameras with me. I found a nearby tree that gives the camera a nearly perfect angle for recording any succeeding visits to this downed top by a woodpecker – both the stripped part, and the part that is almost untouched. We have high hopes for this camera in this location. It will take a photo every 5 seconds from 6 AM to 7 PM every day for three months or more according to the manufacturer.
While we were stopped, we took the opportunity to perform an ADK series and run a couple of playback sequences. During the quiet period, we neither heard nor saw anything suggestive of IBWO, even though there was a lot of activity from other woodpecker species.
As the main stream through the bottom is at a lower level than I have ever seen it, we took full advantage of the opportunity, and crossed at a location where the banks were eroded in such a way as to allow us to get in and out. Remember that the stream bed is incised approximately 15′ into the surrounding ground, so one has to be careful in choosing a crossing point, even with the stream completely dry in places. We did an “M” shaped transect that involved about 3 miles of difficult to negotiate terrain. The dry sloughs and incised cutoff channels are much more common in this area, making traversing the terrain much more difficult. We stopped at lunchtime and at two o’clock performed ADK series and playbacks but heard nothing suggestive of ivorybill activity.
At one point, I was walking near a large tree, paying more attention to the canopy than where I was putting my feet, when I happened to glance down. I quickly hopped to the side, because my left foot was about 3″ from the head of an enormous Canebrake Rattlesnake (Crotalus horridus atricaudatus). Bob backpedaled about 5 quick steps and asked, “Where’s it at?” Like me, he was very impressed with the size and apparent health of this beautiful and potentially deadly predator. Bob later said that he reacted the way he did because, “If it was big enough to startle you, I didn’t want to get too close…” We took a number of photos while the big guy (we estimated his length at nearly 5′) lay placidly with his head on a root buttress, clearly waiting on a convenient squirrel to pass within striking distance. He seemed totally unconcerned with our presence as we circled him (I got quite close several times) making photos. Finally, I just couldn’t resist and asked Bob if he wanted to hear him buzz. I gently poked him with my walking stick a few times. After the third poke, he rattled a bit, and coiled into the “OK, I’m pissed, now leave me alone” position. For those who’ve been dying to know, the answer is, “Five, and a button…”
We exchanged a happy high–five at having encountered this big guy and continued going about our business, leaving him to go about his. Truly an awesome and exciting encounter.
As the day wound down, we worked our way back to the stream, having explored about two and a half to three miles of ground that no one associated with Project Coyote had explored previously. The forest is of outstanding quality with many superdominant trees, mostly sweet gum and Nuttall’s Oak indicating a mature, healthy, and beautiful swamp forest. We crossed, and made our way back to the truck, feeling good about a productive and enjoyable day in the field.
As I mentioned earlier, Bob had spent the first part of the week with some of his USFWS colleagues fishing in south Louisiana. They were successful in bringing home some Redfish and Speckled Trout, both game fish that are exceptionally tasty. When we got in, we cleaned up, and I fried up a good mess of both kinds, along with steak fries and hush puppies. Bob liked my fry mix so much that he brought two ziploc baggies of it home with him for future use. I can make more. Got to teach them folks from up north how to cook!
Mark here pointing out that Bob’s from Tennessee, hardly up north from where I sit. Stay tuned for Part 2.
Day 2 – October 10, 2015
We have only visited the southeastern quadrant of our “northern sector” four times. This is mainly due to the amount of time it takes to cross about a mile and-a-half of the uplands surrounding the bottom. Bob and I decided we would try a longer, but possibly quicker and easier, approach by following a fire lane that is maintained a couple of times a year. It was a pleasant, if boring, hike of about a mile and three quarters, a little further, but much easier going to get to the edge of the bottom.
The forest on this side of the stream is of a somewhat different composition than that on the other side. As well as the sweetgums, loblolly pine, and various Quercus sp. an appreciable percentage of the trees are mature 3′ DBH or more beeches.
We made our way to the main channel with relative ease – this quadrant of the forest seems not to have as many deeply incised sloughs and secondary channels, so the temptation to just keep moving slowly is irresistible. After reaching the main stream, we began to do half-circle transects, looking for anything interesting. We finally took a break about mid-morning, and I performed an ADK series and shortly thereafter a series of playbacks. We then sat quietly for about thirty minutes.
We were separated by about 15 yards, and Bob was sitting at the bottom of a large tree facing away from me. Before we continued on our way, we compared notes, and we had both heard two double knocks, and possibly one kent call. Kent calls, what are and what aren’t, have been debated ad nauseum for years. Suffice it to say that this one, though further away and not as loud, stood out from the Jays that were making a ruckus all around us. All we could say for sure is this one was “different” in a way that’s hard to describe.
We continued on, finding our way back to the bank of the main channel every so often. The stream is dryer than I’ve ever seen it.
At one point, I came upon a series of curves, which being a bit deeper, allowed the water to pond. It was not running and none too fresh, but it was water. I noticed these two turtles on a log, probably a slider of some kind and a cooter. They seemed to be annoyed at one another.
We continued easing through the forest, moving slowly and stopping to listen and look occasionally. I photographed Bob standing next to a large swamp chestnut oak.
We found a bit of intriguing scaling here and there, but no large concentrations. This dying sweetgum snag is a good example. (Note the large insect at the upper right. We have not been able to identify it.)
At about one o’clock, we’d just kept walking through “lunch hour”, we decided to take a break. While we were snacking and rehydrating, I performed another series of ADKs followed by playbacks. After about an hour, Bob and I once again compared notes, and once again we had heard a pair of kents, and a single DK. I have to note that nothing we heard appeared to be a direct response to the recorded kents of the anthropogenic double knocks. While I was sitting there, I made this picture of a Red-headed Woodpecker.
We finally came to a corner with an adjoining piece of private property. As the property line was on a direct bearing for the truck, and was “only” a mile through unexplored terrain, we decided to take a chance even though terrain sometimes imposes obstacles. Fortunately for us (we had covered about six total miles previously) the terrain wasn’t bad at all, and other than a couple of hills to climb, the walk was pretty easy. On the way home, we stopped and picked up dinner at a local BBQ joint that has become something of a Project Coyote tradition.
Day 3 – October 11, 2014
On the way to the search area this morning, Bob and I, feeling a bit peckish, decided to stop at one of the convenience stores on the way. We were a bit mystified to find this sign in the window:
Being a proud son of Louisiana, I’m well aware of our love of foods that are considered a bit, ummm unconventional, but even I was a bit taken aback at the prospect of frying chicks…
We arrived at our entry point about ten minutes after first light and headed into the forest. This particular area Mark has discussed a number of times – a couple of hundred yards from the parking area one encounters a tornado blow-down track that is approximately 400 yards wide. This area is unbelievably difficult to traverse – large boled trees scattered like a giant’s game of pick up sticks, thick, almost impenetrable thickets of new growth, blackberry vines and saw briars, as well as the usual random sloughs, and cutoff stream channels.
It took us nearly an hour to make the half-mile to the location of the snag where photos, discussed in previous posts by Mark, were taken. My express purpose was to place one of our new Plotwatcher Pro cameras in this location. New growth of limbs and underbrush made this deployment a bit more complex than the last time. Bob trimmed intervening vegetation while I programmed, set up and started the camera.
After all this work, I used the camera’s Aimcheck function to make sure that the cam was placed optimally. We then proceeded to follow the bank of the main channel downstream. It should be noted that the stream is not running. In all my years of coming to this area, as a hunter, and searching for ivorybills, I have never seen it this dry.
We came to a familiar ponded slough where Mark and I have often stopped and rested for a few minutes. One of the larger trees, a 3.5 ft. DBH water oak had blown down since the last time Mark and I had visited the area in April. The tree still had leaves on it, though they were dry and brown, and the bole and upper branches had no sign of woodpecker workings. I believe that this tree was blown down on or around July 4th as that was the last time severe weather passed through the area. As they are very light and easy to carry, I had an extra Plotwatcher Pro cam with me. Taking advantage of this opportunity, I deployed the camera with a good view of the bole and top – hopefully this tree will attract insects, and soon thereafter woodpeckers feeding on them.
Bob and I continued upstream for another half mile, located a nice spot with a good view, and I performed an ADK series, followed about ten minutes later by a series of electronic playbacks of Singer Tract ivorybill calls. Shortly thereafter, Bob heard a double rap drum, that was captured on my digital recorder. I personally don’t believe that the drum was a direct response to my ADKs as there was at least a fifteen minute interval after the last of the ADK/playback series.
The double rap is not “perfect” in that the “intra-knock interval” is about .05 seconds longer than the “ideal” – based on averages of the intervals of other Campephilus drums – but it sounds very good.
As we were leaving, I determined to blaze a better trail through the blowdown area. Following a straight bearing on my GPS, I used a hatchet and snips to carve a path through the heavier ground cover. Perhaps crossing will be a bit easier next time.
On the way out of the forest Bob and I were treated to one last encounter. We came across this Buttermilk Racer sunning itself on the road. While not endangered, this snake is uncommon and seldom seen. After taking a few photos of him, I tapped his tail with my foot, encouraging him to seek a safer place out of the roadway.
I really enjoyed Bob Ford’s visit – he is a skilled woodsman and birder, and his insights as a professional wildlife scientist are greatly appreciated. I am looking forward to Mark’s next trip – hopefully over the Thanksgiving holiday.
Also, Mark and I would like to thank The Rapides Wildlife Association, and another donor “MC”, for their much appreciated and unsolicited assistance in purchasing our new trail cams, memory cards, and batteries.
A note from Mark: Frank captured some of the possible kent calls on his recorder. They are faint, and it may not be possible to tease any detail out of them. He may do a follow-up post if anything of interest can be gleaned.