Smithsonian National Museum of Natural History, North American Mammals
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Peromyscus nasutus

Northern Rock Deermouse

Order: Rodentia
Family: Cricetidae

Image of Peromyscus nasutus
Peromyscus nasutus - left (with P. gratus)
Click to enlarge. (73 kb)

Conservation Status: Least Concern.

Northern Rock Deermice live in rocky outcrops and among boulders in pinyon-juniper-oak woodlands in the foothills of mountains from Colorado and New Mexico south to Texas and northern Mexico. Populations of the Deermice are separated from one another because the rocky habitat they find suitable is patchy. This Deermouse has large ears shaped like oyster shells and a long, hairy, tail with which it can grasp branches as it climbs. Acorns appear to be important in its diet, but like other Peromyscus Deermice it is opportunistic, eating various nuts, berries, and plant materials, insects, and mushrooms. Much has yet to be discovered about this rare mouse.

Also known as:
Colorado Cliff Mouse, Juniper Mouse, Northern Rock Mouse

Sexual Dimorphism:

Average: 195 mm
Range: 194-198 mm

Range: 24-32 g


Allen, J.A., 1891.  Bulletin of the American Museum of Natural History, 3:229.


Mammal Species of the World

Distribution of Peromyscus nasutus