Birding By Ear: Western North America, Audio CD

Edited by Roger Tory Peterson. Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute. Birding by Ear: Western includes 90 common birds found west of the Great Plains, arranged in group with similar vocalizations including 'Chippers and trillers,' 'whistlers,' 'name-sayers,' and 'mimics.' 3 CDs.