Other
Mr. Palm: Regions of Texas
The four major geographic regions of Texas are described in text and a slideshow, with a discussion of their landforms, climate, vegetation, animals, and resources.
Smithsonian Institution
National Museum of Natural History: American Mammals: Jones's Pocket Gopher
Many rodents that are adapted to arid conditions--pocket mice, harvest mice, grasshopper mice, deer mice, kangaroo rats, and ground squirrels--occur in the same regions as Jones's Pocket Gopher in western Texas and eastern New Mexico,...