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Little Pocket Mouse

Perognathus longimembris

CommonMammal
Illustration of Little Pocket Mouse (Perognathus longimembris)

The Little Pocket Mouse is one of the smallest North American heteromyids, weighing only 6–8 grams, with a long tail and tiny external cheek pouches. It inhabits sandy and gravelly desert habitats in California, Nevada, Utah, and Arizona. The Preble's subspecies is federally listed as endangered due to urban development in coastal San Diego.

Habitat
Sandy desert scrub, creosote flats, and alluvial fans
Diet
Small seeds, especially wind-blown grass seeds
How common
Common

Best time to see a Little Pocket Mouse

The best time to see a Little Pocket Mouse is March–May, when about 64% of U.S. sightings happen, based on 56 research-grade iNaturalist observations.

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