The Chihuahuan Pocket Mouse differs only slightly in appearance from the Desert Pocket Mouse (Chaetodipus penicillatus) but there is little overlap in their geographic ranges. The Chihuahuan Pocket Mouse is a bit larger and lighter than its cousin and is found in the Chihuahua desert in southern New Mexico, western Texas, and parts of northeastern Mexico (Chihuahua, Coahuila de Zaragoza, Durango, and Zacatecas). Learn more about the Chaetodipus eremicus, more commonly known as a Chihuahuan Pocket Mouse, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.