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The San Joaquin Pocket Mouse vocalizes with low grunts, growls, and squeals, and communicates aggression by tooth-chattering. This species will consume earthworms and soft-bodied insects, but its diet is mainly very tiny seeds of grasses, forbs, and shrubs. Its burrows are conspicuous in the short grass where it lives, in west-central California. To groom their fur, San Joaquin Pocket Mice sandbathe, digging into the loose sandy soil and then sliding and rubbing their bodies in the sand.
Sexual Dimorphism:
Males are slightly larger than females.
Length:
Average:
149 mm males; 147 mm females
Weight:
Range:
7-12 g
References:
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. 15. North American Fauna, 1:1-36.
Links:
Mammal Species of the World
Click here for The American Society of Mammalogists species account
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