The Birder's Handbook: A Field Guide to the Natural History of North American Birds

Paul R. Ehrlich is Bing Professor of Population Studies and Professor of Biology at Stanford University, and a member of the National Academy of Sciences. He is the author of over 400 scientific articles and more than 20 books, including The Population Bomb, Extinction, and The Machinery of Nature. David S. Dobkin is the author of The Birder's Handbook. Darryl Wheye is the author of The Birder's Handbook. 

Susan Roney Drennan Editor, American Birds A dizzyingly competent, extraordinarily readable, impeccably comprehensive and marvelously educational feat! Certainly mandatory reading for everyone even remotely curious about the birds they watch.
Mercedes S. Foster Research Zoologist and Curator of Birds, U.S. Fish and Wildlife Service The Birder's Handbook is a gold mine...that will greatly enhance the joys of watching birds.
David S. Wilcove Ecologist, The Wilderness Society Field guides will help you to recognize birds. This book will help you to understand them....This book should be required reading for all birders, naturalists, and conservationists.
Thomas E. Lovejoy Smithsonian Institution Anyone who owns a field guide to the identification of North American birds will want The Birder's Handbook as a companion volume.