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David Allen Sibley’s Followers (141)
David Allen Sibley
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David Allen Sibley isn't a ŷ Author
(yet),
but they
do have a blog,
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Distinguishing Philadelphia and Red-eyed Vireos by song: Is it possible?
Possible? It might be, but most of the widely published “differences� are too subjective and/or too variable to be of any value. I dug into this a couple of years ago and discovered some details that seem more reliable, which are summarized in the one page file here (also as a pdf via this link: […]
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The Sibley Guide to Birds
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published
2000
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13 editions
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What It's Like to Be a Bird: From Flying to Nesting, Eating to Singing—What Birds Are Doing, and Why
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published
2020
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2 editions
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The Sibley Field Guide to Birds of Eastern North America
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published
2003
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5 editions
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The Sibley Guide to Bird Life & Behavior
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published
2001
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9 editions
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The Sibley Field Guide to Birds of Western North America
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published
2003
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6 editions
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Sibley's Birding Basics: How to Identify Birds, Using the Clues in Feathers, Habitats, Behaviors, and Sounds
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published
2002
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9 editions
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The Sibley Guide to Trees
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published
2009
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2 editions
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The Sibley Birder's Life List and Field Diary
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Birds of Instagram: Extraordinary Images from Around the World
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The North American Bird Guide
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published
2000
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5 editions
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“The Peregrine Falcon is the fastest animal in the world, capable of speeds of at least 242 miles per hour and potentially more than 300 miles per hour, and is able to make turns that generate 27 Gs (one G is the force of gravity, and humans lose consciousness at 9 Gs).”
― What It's Like to Be a Bird: From Flying to Nesting, Eating to Singing—What Birds Are Doing, and Why
― What It's Like to Be a Bird: From Flying to Nesting, Eating to Singing—What Birds Are Doing, and Why
“It can be difficult to accept the fact that a lot of birds have to be identified as “possible� or “probable.”
― Sibley's Birding Basics
― Sibley's Birding Basics
“Many species undergo an additional partial molt each year, involving just some head and body feathers. This most often occurs in the late winter or early spring and is called the pre-alternate molt, resulting in the alternate plumage. Many species, but not all, have an alternate plumage. Because this is only a partial molt (not involving all feathers), the new feathers of the alternate plumage are worn alongside the older feathers of the basic plumage.”
― Sibley's Birding Basics
― Sibley's Birding Basics
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Topics Mentioning This Author
| topics | posts | views | last activity | |
|---|---|---|---|---|
| The History Book ...: BIRDING AND BIRD WATCHING | 53 | 163 | Jun 01, 2020 10:24PM | |
| Retro Chapter Chi...: ¢ Free and Cheap Deals 2020 ¢ | 314 | 32 | Dec 26, 2020 05:01PM |
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