This book is an indispensable resource for all birders seeking an authoritative and portable guide to the birds of western North America.
From the New York Times -
"Once in a great while, a natural history book changes the way people look at the world. In 1838, Jon James Audubon's Birds of America was one...In 1934, Roger Tory Peterson produced Field Guide to the Birds...Now comes The Sibley Guide to Birds."