| 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.
Males are slightly larger than females.
149 mm males; 147 mm females
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.
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