David Allen Sibley

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''. Provided by Wikipedia