Sibley Field Guide to Birds of Western N

Description COMPLETELY REVISED AND UPDATED: From renowned birder, illustrator, and New York Times best selling author David Sibley, the most authoritative guide to the birds of the West, in a portable format that is perfect for the field. Compact and comprehensive, this guide features 715 bird species, plus regional populations, found west of the Rocky Mountains. Entries include stunningly accurate illustrations–more than 5,046 in total–with descriptive captions pointing out the most important field marks.