No other ground squirrel within its range has its color pattern. Skull has 22 teeth. There are 10 mammae. Thos e in sw. Texas and central s.
Chipmunks have no white undertail.
Ammospermophilus interpres is an antelope squirrel of rocky foothills in desert, grassland, and lower woodland. The animals are frequently observed sitting on prominent boulders and in tops of junipers or large shrubs. They do not seem to occur very far away from such situations. Loss of water in the excretion of nitrogenous wastes is held to a minimum by the efficiency of the kidney. Also, because these squirrels are omnivorous, feeding on seeds, plants, invertebrates, and vertebrates, succulent food items are present in the diet in all months of the year.