01484cam a2200241 4500 264271166 TxAuBib 20000610120000.0 940125s1977||||||||||||||||||||||||eng|u 76047938 9780394414102 0394414101 (OCoLC)3002629 TxAuBib Udvardy, M. D.F. The Audubon Society Field Guide to North American Birds : Western Region / [by] M. D. F. Udvardy ; visual key developed by Susan Rayfield. New York : Knopf, 1977. 855 p. : ill. Introduced in 1977 and completely revised in 1994, these bestselling photographic field guides have become the birding bibles of more than four million enthusiasts. Virtually every bird found in North America is brought to life in a full-color photograph and with textual information on the bird's voice, nesting habits, habitat, range, and interesting behaviors. Accompanying range maps; overhead flight silhouettes; sections on bird-watching, accidental species, and endangered birds make these the most comprehensive field guides to birds available. Note: the Western Edition covers the Rocky Mountain range and all the states to the west of it, while the Eastern Edition generally covers states east of the Rocky Mountains. 20000801. Birds North America Identification. TXHAM