Many thanks to the following for information/images used in this publication.
Manaster, Jane. Horned Lizards. Austin: University of Texas Press, 1997.
Smith, Hobart. Handbook of Lizards. Ithaca: Comstock Publishing CO., 1946.
Pianka, Eric. Ecology and Natural History of Desert Lizards. Princeton: Princeton UP, 1986.
Taber, Stephen. The World of Harvester Ants. College Station: Texas A&M UP, 1998
The journal of experimental biology [0022-0949] Ott yr:2004 vol:207 iss:17 pg:3067
Sherbrooke, Wade C., and J Russellmason. "Sensory Modality used by coyotes in responding to antipredator compounds in the blood of Texas horned lizards. " The Southwestern Naturalist 50.2 (2005): 216-222.
Photos by Paul M. Montgomery and Wyman Meinzer