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The Sibley Guide to Birds is a reference work and field guide for the birds found in the continental United States and Canada. It is written and illustrated by ornithologist David Allen Sibley . The book provides details on 810 species of birds, with information about identification, life history, vocalizations, and geographic distribution.
David Allen Sibley (born October 22, 1961, in Plattsburgh, New York) is an American ornithologist. He is the author and illustrator of The Sibley Guide to Birds , which rivals Roger Tory Peterson 's as the most comprehensive guides for North American ornithological field identification.
File:Bookbits - 2009-11-03 David Allen Sibley-The Sibley Guide to Birds.vorb.oga. Add languages. ... Upload file; Special pages; Printable version; Page information;
The Sibley Guide to Bird Life & Behavior is a book by David Allen Sibley that shows readers "how birds live and what they do." It is different from most field-identification guides that birdwatchers carry around; rather than help identify birds, it helps watchers gain a deeper understanding of the birds they have already identified.
Upload file; Special pages; ... A Field Guide to the Birds of Hawaii and the Tropical Pacific; ... The Sibley Guide to Birds
Charles Gald Sibley (August 7, 1917 – April 12, 1998) was an American ornithologist and molecular biologist.He had an immense influence on the scientific classification of birds, and the work that Sibley initiated has substantially altered our understanding of the evolutionary history of modern birds.
After numerous papers had been written suggesting downgrading this species to a subspecies or even a morph of Iceland gull, the American Ornithologists' Union invalidated Thayer's gull as a full species in the 2017 annual supplement to the American Ornithologists' Union checklist. [6] Thayer's gull is now considered a subspecies of Iceland Gull ...
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