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California Mouse
(Peromyscus californicus)

The California Mouse is a gray-brown, large sized mouse that occurs abundantly on the Etiwanda Fan. This is the largest species of white-footed mouse that occurs on the fan. The California Mouse is found in chaparral, coastal sage scrub, alluvial fan sage scrub and foothill woodland habitats from central California south into Baja California. There are 5 races of California Mouse. The local race is P. c. insignis.

Status: Not protected
Habitat: Chaparral, coastal sage scrub, alluvial fan sage scrub, and foothill woodlands
Diet: Insects and seeds
Mean* adult body length: 99.1 mm
Mean* adult tail length: 128.9 mm
Mean* adult hind foot length: 23.6 mm
Mean* adult ear length: 22.3 mm

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

The graph below shows the activity periods of adults and immatures from 1999 through 2001. Both the adult and immature individuals can be present year around. Note that immature individuals grow to adult size and molt into adult pelage within a single breeding season.

Back to Mammals of the Etiwanda Fan


Plant Communities of the Etiwanda Fan
Amphibians and Reptiles of the Etiwanda Fan
Birds of the Etiwanda Fan
Mammals of the Etiwanda Fan

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