Peterson Field Guides

Peterson Field Guides, Western Birds

Designed by Roger Tory Peterson, these informative field guides are invaluable resource tools. Each guide features full-color illustrations and drawings, and the unique Peterson Identification System. Sponsored by the National Audubon Society, the National Wildlife Federation, and the Roger Tory Peterson Institute. Softcover. 7-1/8˝L x 4-1/2˝W.