Oregon mammals

Shadow Chipmunk in Oregon

Neotamias senex

Native to Oregon S4 Apparently Secure in Oregon

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

Shadow Chipmunk in Oregon, by the numbers

Rare in Oregon 145th most recorded of 178 mammals logged in Oregon

109 occurrence records

Records from 2000–2026.

When to look for the Shadow Chipmunk in Oregon

Most sightings fall in August to September.

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

Monthly Oregon records (table)
MonthRecords
January0
February0
March0
April1
May13
June21
July13
August29
September25
October7
November0
December0

Monthly shadow chipmunk occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

Year-round in Oregon, with recorded sightings peaking in August–September, with a smaller rise in June.

Occurrence map

Where Shadow Chipmunk has been recorded in Oregon

109 records mapped · zoom and drag to explore

109 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Crater Lake National Park 4
Gearhart Mountain Wilderness 1
Cascade-Siskiyou National Monument 1
Three Sisters Wilderness 1

Protected places with the most shadow 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 Oregon

CountyRecords
Klamath County 34
Deschutes County 31
Jefferson County 22
Lane County 8
Jackson County 7
Lake County 4
Douglas County 2
Marion County 1

The complete county distribution, spread across 8 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Shadow chipmunks favor dense, shaded conifer forest, exactly the kind of cover found around Cape Perpetua Scenic Area’s coastal forest and the Oregon Dunes’ timbered fringe, though this species prefers a heavier canopy than the open, sun-exposed dunes themselves.

Only 3 iNaturalist records exist in Oregon’s current window, clustered in May, July, and September, too few to draw out a real seasonal pattern. NatureServe ranks the species S4, apparently secure, and like other chipmunks it’s active by day, which makes the thinness of the record more a reflection of limited survey effort than genuine scarcity.

Occurrence data from iNaturalist.

More mammals in Oregon 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"