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    YouTube videos on habitats, Peru, IBWO, 4K, etc.

    As discussed below, I have updated three bird related video playlists on YouTube. Some of the videos were posted previously in 1080p, but they have now been upgraded to 4K. I wasn't aware until recently that the difference between 1080p and 4K on YouTube is more than just the number of pixels...
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    Ivory-billed Woodpecker: Debunking the Critics

    Over the years, there have been many posts on birdforum about the Ivory-billed Woodpecker. Despite a lack of quality in these discussions, I have posted occasional updates about my work on this topic for any bird watchers who might be interested in this magnificent bird and its conservation. I...
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    new paper on the Ivory-billed Woodpecker

    In this thread and others during the past decade or so, many birders have displayed hubris and ignorance in discussions of the Ivory-billed Woodpecker. Making comments on evidence that they admittedly haven't even seen. Posting comments by David Sibley that don't have any relevance to the...
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    new paper on the Ivory-billed Woodpecker

    As stated previously, I'm not going to participate in discussions with bird watchers who repeatedly demonstrate a lack of logical reasoning skills, make comments on data they haven't bothered to study, and think they know it all when in fact they aren't aware of basic facts. However, I will...
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    new paper on the Ivory-billed Woodpecker

    In closing out my participation in this discussion, I need to address a claim that bird watchers are my peers. Nothing that anyone has posted here indicates that they are my peer. Not even remotely close. There is nothing wrong with that, but I can't allow uninformed claims about the...
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    new paper on the Ivory-billed Woodpecker

    I don't know why you would be looking at avi files. All of the movies in the supplemental material of my papers are in mov and mp4 format. The analysis of the 2008 video does not require any information on the flap rate of the Ivory-billed Woodpecker. It is based on ruling out the Pileated...
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    new paper on the Ivory-billed Woodpecker

    In this case, it is a statistical slam dunk that it's not a Pileated Woodpecker according to an expert in the application of statistics.
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    new paper on the Ivory-billed Woodpecker

    Everyone has their own opinion. Other scientists have told me that they love the illustrations. I would certainly enjoy seeing recreations of the scenarios of other observations of this species. The difference in the color of the eyes of the large woodpeckers and the surrounding plumage is a...
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    new paper on the Ivory-billed Woodpecker

    I'm sorry that you aren't able to play the mp4 and mov files (which are industry standards) on your computer. Which specific videos gave you trouble? I have always used standard programs to encode videos. The ones that I have posted on YouTube have been viewed for a total of 254 days of watch...
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    new paper on the Ivory-billed Woodpecker

    The standard deviation is a measure of how observations fluctuate about the mean. In this case, the flap rate of the bird in the video is about ten standard deviations greater than the mean flap rate of the Pileated Woodpecker. That species may therefore be ruled out. I consulted with experts in...
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    new paper on the Ivory-billed Woodpecker

    They are discussed starting at about 5:38 in this lecture on the 2008 video.
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    new paper on the Ivory-billed Woodpecker

    You state that you weren't able to view the data and gave up. If that is true, how can you make any informed comment about the data, one way or the other? Just for your information, the data that you refer to as "dreadful" received strong positive assessments from independent experts. If you are...
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    new paper on the Ivory-billed Woodpecker

    Credibility is in the eye of the beholder. Signs that my data have credibility include the published assessments of independent experts, comments made privately by other ornithologists and scientists who have studied the data, comments by anonymous reviewers, and the fact that it has been...
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    new paper on the Ivory-billed Woodpecker

    Tobalske concluded that the bird in the video is a large woodpecker. It is a trivial matter to estimate the flap rate from the video, and the value is about ten standard deviations greater than the mean flap rate of the Pileated Woodpecker. Tobalske pointed this out with the comment, "The bird...
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    new paper on the Ivory-billed Woodpecker

    You missed an important detail.
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    new paper on the Ivory-billed Woodpecker

    It is unfortunate when open discourse in science is stifled by ignorance, politics, and fear. I thought this kind of thing came to an end with the persecution of Galileo in the Middle Ages. I don't blame Tobalske or anyone else for shying away from this topic, but it was courageous of him to...
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    new paper on the Ivory-billed Woodpecker

    It's not necessary to be an expert on woodpecker flight mechanics in order to confirm that the bird in the 2008 video is a large woodpecker. The two large woodpeckers are the only large birds that occur north of the Rio Grande that fold their wings closed in the middle of each upstroke during...
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    new paper on the Ivory-billed Woodpecker

    The link that you provided shows only one of numerous events that appear in the videos. It is not necessary to have clear video footage to resolve characteristics such as flight path, wing motion, flap rate, flight speed, behaviors, body proportions, and partial field marks. All of the...
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    new paper on the Ivory-billed Woodpecker

    For those who understand that questions can often be answered by analyzing data that isn't a pretty picture, I suggest that you study the videos, each of which contains stronger evidence for the persistence of the Ivory-billed Woodpecker than anything else that has been obtained during the past...
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    new paper on the Ivory-billed Woodpecker

    Tobalske didn't claim to cover the full range of the Pileated's flight range. His flap rate statistics are for cruising flight, which is the only type of flight that is known to be amenable to statistical analysis. His paper is available here. His statistics for the Pileated are based on data...
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    new paper on the Ivory-billed Woodpecker

    What do you know about the evidence that has been presented so far? Three of my sightings are verified by video footage that shows flights, other behaviors, body proportions, and field marks that are consistent with the Ivory-billed Woodpecker but no other species. I challenge you to attempt to...
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    new paper on the Ivory-billed Woodpecker

    I was hoping to participate in intelligent discussions among birders who are interested in conservation. It was a waste of time.
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    new paper on the Ivory-billed Woodpecker

    By mentioning that paper, you have demonstrated that you have no idea what you are talking about. The bird in the 2008 video was in cruising flight, which is the only type of avian flight that is amenable to statistical analysis. That paper discusses Pileated Woodpeckers that were flushed into...
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    new paper on the Ivory-billed Woodpecker

    Have you never identified a bird in the field with 100% certainty? I have no doubts about any of my ten sightings of the Ivory-billed Woodpecker. I would never claim to know the truth about everything, but knowledge comes from direct experience and research. For those reasons, I know a great...
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    new paper on the Ivory-billed Woodpecker

    Scientists establish facts all the time using various types of data. As discussed in Sec. 5 of my latest paper, it is unlikely that anyone will obtain ideal data due to a "perfect storm" combination of factors related to habitat and behavior. The analysis in that section is consistent with the...
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