Texas Parks and Wildlife
Texas Parks and Wildlife: Texas Horned Lizard
This site is dedicated to providing information about and the preservation of the Horned Lizard (Phrynosoma cornutum). It describes the animal's history, as well as its habitat and distribution.
Other
Pure texan.com: Texas Horned Lizard
Named the Texas state reptile in 1992, this horned toad is really a lizard. You can read all about it here, including its names, types, habitat, and efforts to ensure its survival as a species.