| Order | Rodentia |
| Family | Sciuridae |
| Genus | Ammospermophilus |
| Binomial name | Ammospermophilus harrisii |
The Harris’s antelope squirrel weighs around 110 to 140 grams and usually has a body length of 22-25 cm. This species of rodent is found in Arizona and New Mexico, as well as in the Mexican state of Sonora.
Named after naturalist Edward Harris, these squirrels have distinctive white marks on the back of their gray fur and brown shadows on the side. The eyes are circled with white furs. During the winter season, the fur hairs are longer.