Peterson Field Guide to Western Birds
Here's what other sites are saying:
This 432-page guide is bursting with full-color paintings and shows more than 1,000 birds from 700 species--all found west of the Great Plains. Peterson, Roger Tory. Softcover; 3rd Edition; full-color and black-and-white illustrations. Houghton Mifflin Company. 441 range maps and easy-to-use facing-page format.