Oregon mammals

Washington Ground Squirrel in Oregon

Urocitellus washingtoni

Native to Oregon S2 Imperiled 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

NT – Near Threatened

Close to qualifying as threatened in the near future.

Washington Ground Squirrel in Oregon, by the numbers

Rare in Oregon 137th most recorded of 178 mammals logged in Oregon

23 occurrence records
7 with iNaturalist photos
Apr 13, 2026 Last seen in Oregon

Records from 2000–2026.

When to look for the Washington Ground Squirrel in Oregon

Most sightings fall in April to May.

23 Oregon occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly Oregon records (table)
MonthRecords
January0
February2
March3
April7
May10
June1
July0
August0
September0
October0
November0
December0

Monthly washington ground squirrel occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

Year-round in Oregon, with recorded sightings peaking in April–May.

Occurrence map

Where Washington Ground Squirrel has been recorded in Oregon

23 records mapped · zoom and drag to explore

23 Oregon records mapped

Where it's recorded in Oregon

CountyRecords
Morrow County 17
Umatilla County 6

The complete county distribution, spread across 2 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Oregon’s Washington ground squirrel record is 23 entries deep, and it fits almost entirely in two counties. Morrow holds 17 and Umatilla 6, the big sagebrush and wheat country south of the Columbia River. That northeastern corner holds the state’s documented share of a species centered across the river in Washington’s Columbia Basin. The record is thin enough that every verified colony matters.

The calendar matches the animal’s life. Reports run from February through June, peak in April and May, then stop. These squirrels spend the hot months and the winter alike underground. They’re visible for barely a quarter of the year. NatureServe ranks the species imperiled in Oregon, and the IUCN lists it as Near Threatened rangewide. With so few Oregon points on record, the line between ‘rare’ and ‘rarely searched for’ stays blurry. The conservation grades make any sighting in the Boardman-to-Hermiston country worth reporting.

Occurrence data from iNaturalist and GBIF.

Washington Ground Squirrel in other states

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