Stokes Field Guide to Bird Songs: Western Region (Unabridged‪)‬

The easiest-to-use and most comprehensive field guide to North American birds - from the country's preeminent writers on birds and nature. Drawing on more than 20 years' experience as bird and wildlife experts, Donald and Lillian Stokes have produced field guides that are factually, visually, and organizationally superior to any other books you can buy.