Little Pocket Mouse
(Perognathus longimembris)

The Little Pocket Mouse is a golden-brown heteromyid that occurs sporadically on the Etiwanda Fan. This is the smallest heteromyid species that occurs there. The Little Pocket Mouse is found in a variety of arid and semi-arid habitats in southern California. There are 16 races of Little Pocket Mouse. Our local race is the Los Angeles Pocket Mouse (P. l. brevinasis), which is found in sandy areas of coastal sage scrub, grasslands, and washes.

Status: P. l. brevinasis is a California Species of Special Concern; P. l. pacificus (Pacific Pocket Mouse) is Federally Endangered
Habitat: Sandy areas of chaparral, coastal sage scrub, alluvial fan sage scrub, desert scrub, and washes
Diet: Seeds and some insects
Mean* adult body length: 56.7 mm
Mean* adult tail length: 70.2 mm
Mean* adult hind foot length: 16.2 mm
Mean* adult ear length: 6.3 mm

*mean measurement of individuals captured in the San Bernardino Valley by Museum researchers

The graph below shows the activity periods of adults from 1999 through 2001.

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