Smithsonian National Museum of Natural History, North American Mammals
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  Rodentia · Heteromyidae · Chaetodipus formosus
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Chaetodipus formosus

Long-tailed Pocket Mouse

Order: Rodentia
Family: Heteromyidae

Image of Chaetodipus formosus
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Conservation Status: Least Concern.

The range of the Long-tailed Pocket Mouse is mostly within the Mojave Desert, Colorado Desert, and the Great Basin. On cold nights, this animal becomes inactive, and usually remains within its burrow system during winter. It nearly always is found in habitats where there are rocks. Small piles of soil at the bases of rocks may indicate its presence.

Sexual Dimorphism:

Range: 171-211 mm

Range: 17-25 g


Merriam, C.H., 1889.  Preliminary revision of the North American pocket mice (genera Perognathus et Cricetodipus auct.) with descriptions of new species and subspecies and a key to the known forms, p., 17.  North American Fauna, 1:1-36.


Mammal Species of the World

Distribution of Chaetodipus formosus