The Audubon Society Field Guide to North American Birds, Western Region by the National Audubon Society is a red flexible vinyl/flexibound-style field guide, not a paperback.
This pictured copy is a later printing noted on the copyright page as Twelfth Printing, May 1986.
It is in good pre-owned condition and offers illustrated reference material for birdwatching and nature study.
Measures 7.5 in tall, 4 in wide, and 1.5 in long. Weighs 1.2 lbs.