"A Field Guide to the Birds of Texas (and Adjacent States)" by Roger Tory Peterson

First published in 1960, this field guide covers 542 species of birds found in Texas and the adjacent states. This pocket guide, created by one of America's leading ornithologists, uses the famous system of identification Peterson developed emphasizing distinguishing characteristics of birds when seen at a distance. Full-page plates, 36 of which are in color, and numerous text drawings further illustrate various species or highlight features essential to accurate identification.