California mammals

Yellow-cheeked Chipmunk in California

Neotamias ochrogenys

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

LC – Least Concern

Widespread and abundant; not at risk.

Yellow-cheeked Chipmunk in California, by the numbers

Occasional in California 139th most recorded of 241 mammals logged in California

457 occurrence records
151 with iNaturalist photos

457 total records count every California occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300.

When to look for the Yellow-cheeked Chipmunk in California

Most sightings fall in June.

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

Monthly California records (table)
MonthRecords
January10
February2
March11
April22
May38
June112
July67
August97
September58
October22
November11
December7

Monthly yellow-cheeked chipmunk occurrence records (iNaturalist and GBIF) in California.

Seasonality

Year-round in California, with recorded sightings peaking in June, with a smaller rise in August.

Occurrence map

Where Yellow-cheeked Chipmunk has been recorded in California

300 records mapped · zoom and drag to explore

300 California records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Humboldt Redwoods State Park 17
Jackson Demonstration State Forest 14
Mendocino Headlands State Park 5
Jug Handle State Natural Reserve 4
Angelo Coast Range Reserve 4
Hendy Woods State Park 3
Montgomery Woods State Natural Reserve 2
Kruse Rhododendron State Natural Reserve 2

Protected places with the most yellow-cheeked chipmunk 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
Mendocino County 229
Humboldt County 122
Sonoma County 98
Del Norte County 6
Marin County 1
Other localities 1

The complete county distribution, spread across 5 California counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

The yellow-cheeked chipmunk is a true California endemic, found nowhere else on Earth, yet this page’s raw GBIF count runs into the hundreds of thousands. That number reflects a broader squirrel-family match rather than confirmed sightings of this species. The 111 research-grade iNaturalist records are the reliable figure here.

A narrower range than the refuge list suggests

This chipmunk’s real range sits in the cool, fog-fed redwood and Douglas-fir forests of the far northwest corner of California, well north of Point Reyes and nowhere near the Channel Islands, both listed on this page as places to see it. Real habitat means dense coastal forest with fallen logs and thick low cover, not the marshland and island terrain the site’s generic refuge list points to.

Built for logs and low branches, not open ground

A warm yellow or ocher wash across the face and shoulders gives this chipmunk its name, though light and worn fur can soften that color enough that it’s easy to confuse with the other chipmunks sharing the same forests. It forages on the ground and climbs into shrubs by day, using fallen trees as both a path and a lookout, and disappears into dense cover fast when a hawk or a mammal gets too close. Seeds, fruits, and fungi make up most of its diet, and food it caches but never recovers can end up sprouting into new plants.

Status in California

NatureServe hasn’t assigned the yellow-cheeked chipmunk a numeric rank in California, and the species is treated as native, which makes sense for an animal that exists nowhere outside the state. Because its whole range is this one narrow strip of coast, forest loss or fragmentation there carries more weight for this chipmunk than it would for a species with room to spread elsewhere.

Occurrence data from iNaturalist.

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"