Is This an Ivory-billed Woodpecker? Bobby Harrison Presents His 2020 Video and Analysis

Описание: 𝗕𝗼𝗯𝗯𝘆 𝗛𝗮𝗿𝗿𝗶𝘀𝗼𝗻 is an experienced and accomplished Ivorybill searcher. On February 27, 2004, Bobby and 𝗧𝗶𝗺 𝗚𝗮𝗹𝗹𝗮𝗴𝗵𝗲𝗿 saw an Ivory-billed Woodpecker in Arkansas. This helped launch the effort that led to the exciting April 28, 2005 U.S. Department of Interior proclamation that the Ivory-billed Woodpecker still survived.

𝗕𝗼𝗯𝗯𝘆 presented his October 2020 video at Mission Ivorybill's August 1, 2022 Zoom meeting.

We were also joined by two other experts who shared their thoughts:
𝗧𝗶𝗺 𝗚𝗮𝗹𝗹𝗮𝗴𝗵𝗲𝗿, author of the excellent book, 𝑇ℎ𝑒 𝐺𝑟𝑎𝑖𝑙 𝐵𝑖𝑟𝑑: 𝐻𝑜𝑡 𝑜𝑛 𝑡ℎ𝑒 𝑇𝑟𝑎𝑖𝑙 𝑜𝑓 𝑡ℎ𝑒 𝐼𝑣𝑜𝑟𝑦-𝑏𝑖𝑙𝑙𝑒𝑑 𝑊𝑜𝑜𝑑𝑝𝑒𝑐𝑘𝑒𝑟; and, 𝗝𝗶𝗺 𝗧𝗮𝘁𝗲, Science Advisor to the U.S. Secretary of the Interior during the 2004-2005 Arkansas Ivorybill era and Former Assistant Director of the Cornell Lab of Ornithology.

Note: Zoom compresses recorded meetings. (All online meeting platforms work this way.) Therefore, Bobby's video does not appear as clear as it did in our live meeting.


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Time stamps:
0:00:00 Jim Tate's comments
0:01:49 intro
0:03:06 a note on resolution
0:05:43 who we are and our motivation
0:07:24 history repeats itself

0:09:54 Bobby Harrison; comments on presenting his video to USFWS
0:11:23 Background and analysis of video
0:14:42 Reminder of what Ivorybills look like
0:15:18 First Flyby 1/8 speed; Second Flyby 1/6 speed
0:19:12 Second Flyby frame-by-frame; presenting this as evidence, not proof
0:24:54 First Flyby frame-by-frame at 400%
0:34:46 Flight and Speed; estimated flight speed of bird in video
0:40:44 Jim Tate explaining aspect ratio
0:41:36 Wing Beat Frequency Comparison for Sustained Flight
0:43:47 Why this bird is not a...
0:46:58 Features suggesting the bird in the video is an Ivorybill
0:50:02 Flyby in Real Time
0:52:15 First Flyby 1/8 speed; Second Flyby 1/6 speed

0:53:21 beginning questions and comments
0:55:05 discussion about cameras
0:58:26 Tim Gallagher's comments
1:02:42 further discussion about cameras
1:07:20 additional questions and comments
2:08:33 closing