When the Sibley Guide to Birds was published in 2000, it was an overnight sensation, selling 500,000 copies in its first nine months (more than 1.5million copie
Designed to fit in a backpack or pocket for easy access, each of these handy and popular bird field guides comprises 272 pages and features about 175 birds orga
A field guide to North American birds presents an identification method that uses panoramic illustrations, range maps, and an organization system based on habit