California mammals

White-eared Pocket Mouse in California

Perognathus alticolus

Native to California SNR Unranked in California

Not listed as nonindigenous in California by USGS NAS; native to its California range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

VU – Vulnerable

High risk of extinction in the wild.

White-eared Pocket Mouse in California, by the numbers

Occasional in California 122nd most recorded of 243 mammals logged in California

194 occurrence records
1 with iNaturalist photos

Records from 2000–2026.

When to look for the White-eared Pocket Mouse in California

Most sightings fall in September to October.

194 California occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly California records (table)
MonthRecords
January0
February0
March1
April12
May7
June11
July19
August22
September75
October47
November0
December0

Monthly white-eared pocket mouse occurrence records (iNaturalist and GBIF) in California, 2000–2026.

Seasonality

Year-round in California, with recorded sightings peaking in September–October.

Occurrence map

Where White-eared Pocket Mouse has been recorded in California

194 records mapped · zoom and drag to explore

194 California records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Hungry Valley State Vehicular Recreation Area 1
Angeles National Forest 1

Protected places with the most white-eared pocket mouse sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in California

CountyRecords
San Bernardino County 129
Kern County 44
Los Angeles County 14
Inyo County 7

The complete county distribution, spread across 4 California counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

White-eared pocket mouse records are confined to California’s high southern mountains and nearby upland slopes, making habitat islands more important than a broad statewide search. Yosemite, Sequoia, and Tahoe suggest elevation, but they sit north of the species’ best-known San Bernardino Mountain setting.

September dominates the reports, followed by October, while the series has no records from November through February or in early spring. With so few months represented, survey timing can easily create that shape. Empty months aren’t evidence that this hidden, nocturnal mouse is absent from its burrows.

Occurrence data from iNaturalist and GBIF.

More mammals in California in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"