David Allen Sibley

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David Allen Sibley
Sibley at the 2014 National Book Festival
Born	October 22, 1961 (1961-10-22) (age 63) Plattsburgh, New York
Occupation	Author Ornithologist Illustrator
Nationality	American
Subject	Birds
Notable works	The Sibley Guide to Birds
Website
www.sibleyguides.com

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.

Sibley has also authored a follow-up book, The Sibley Guide to Bird Life & Behavior.