A Field Guide to the Birds of Texas by Roger Tory Peterson. Houghton Mifflin Company. 1960.
Western Birds by Roger Tory Peterson. Houghton Mifflin Company. Third Edition 1989.
Butterflies of West Texas Parks and Preserves by Roland H. Wauer. Texas Tech University Press. 2002.
Dragonflies and Damselflies of the West by Dennis Paulson. Princeton University Press. 2009.
Photographic Atlas of Entomology and Guide to Insect Identfication by James L. Castner. Feline Press. 2000.
Amphibians & Reptiles of Texas by James R. Dixon, Everbest Printing Co. 2013
A Field Guide to Rocky Mountain Wildflowers by John J. Craighead, Frank C. Craighead, Jr. & Ray J. Davis, The Riverside Press Cambridge. 1963.
A Guide to the Plants of the Northern Chihuahuan Desert by Carolyn Dodson. University of New Mexico Press. 2012.
Cacti of Texas by Del Weniger, University of Texas Press. 1984.
Cactus of Texas by Nora & Rick Bowers, Adventure Publications , Inc.
Desert Wildflowers of North America by Ronald J. Taylor. Mantec Production Company. 1998.
Land of Enchantment Wildflowers by Willa F Finley & Lashara J. Nieland. Texas Tech University Press. 2013.
Texas Wildflowers by Campbell & Lynn Loughmiller. University of Texas Press. 2006.
Weeds of North America by Richard Dickinson and France Rover. The University of Chicago Press. 2014
Wildflowers, Trees, and Shrubs of Texas by Delena Tull & Gorge Oxford Miller. Gulf Publishing Company. 1999.
Wildflowers of Texas by Geyata Ajilvsgi. Shearer Publishing. 1985.