Increasing agriculture and urban development is an increasing problem for Nelson's antelope squirrel. Unfortunately for the Nelson's antelope squirrel, there is not an abundant water source nearby. Each antelope squirrel has a white ventral surface with little variation. To further help prevent predation, the Nelson's antelope squirrel has an alarm call. Morgart observed a white-tailed antelope squirrel capturing and eating a silky pocket mouse. The white-tailed antelope squirrel is commonly spotted in arid habitats throughout the southwestern United States. Nelson's antelope squirrel is a short-lived species that often does not survive to a year. Harris's antelope squirrel ("Ammospermophilus harrisii") is a species of rodent in the family Sciuridae.