Washington Ground Squirrel

Urocitellus washingtoni

NTNear Threatened

The Washington ground squirrel is a lightly built, speckled ground squirrel of the Columbia Basin, found only in eastern Washington and a corner of north-central Oregon. It was once so scarce that its fate drew national attention, and the IUCN still lists it as Near Threatened. Records today come mostly from a handful of Washington counties where shrub-steppe survives.

Range through the year

Where Washington Ground Squirrel is seen

Washington Ground Squirrel is recorded in 2 US states from 29 occurrence records, most heavily in Washington (24 records) and Oregon (5).

Current range29 records · 2 states
AlabamaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregon · 5 records · view state pagePennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashington · 24 records · view state pageWest VirginiaWisconsinWyomingAlaskaAKHawaiiHIPuerto RicoPR
Occurrence data by state and month
Washington Ground Squirrel – occurrence records by US state and month (29 total across 2 states)
StateJanFebMarAprMayJunJulAugSepOctNovDecYear
Washington··7971······24
Oregon··212·······5

Based on 284 georeferenced US records, 2000-2026. Shading is observation density (where people record sightings), not true abundance. Alaska, Hawaii & Puerto Rico shown as insets.

Explore by state

Washington Ground Squirrel across 2 states

Occurrence records, conservation status, and the places it turns up, state by state. Open a state for detail, or visit its full page.

  • WashingtonNativeRare261 records

    State rankImperiled

    Notable placesWashington State Department of Natural Resources (WADNR) State Resource Management Area · Washington State Department of Fish & Wildlife Trust Land

    Countiesrecorded in 11

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

  • OregonNativeRare23 records

    State rankImperiled

    Countiesrecorded in 2

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

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.

SizeWashington Ground Squirrel beside a 1.8 m adult, drawn to scale
Created by potrace 1.16, written by Peter Selinger 2001-2019 Created by potrace 1.16, written by Peter Selinger 2001-2019
Body length
23–28 cm9 in–11 in
Weight
120–300 g4.2–11 oz

Silhouettes drawn to scale against a 1.8 m5 ft 11 in adult.

Elevation

From 200 georeferenced records, the Washington Ground Squirrel is recorded from 134 m440 ft to 768 m2,520 ft, with half of sightings below 276 m906 ft.

Each band shows the share of georeferenced sightings that fall within it. Records cluster where people live and hike, so low, populated elevations are over-represented. Read this as observation density, not true abundance.

Observation peakApril23 recordsBased on a small number of dated records; the seasonal pattern may not be representative.

Seasonality from research-grade observation dates across the US (23 records, all years). Reflects when the species is recorded, not a guarantee of presence.

Best encounter

Where and when to see a Washington Ground Squirrel

Your best chance: Washington, in April.

Where
WashingtonWA
When
April

Commonly confused with

Animals people sometimes mistake for the washington ground squirrel, and how to tell them apart.

Speckles on gray

Look for a slim ground squirrel about 9 to 11 inches long with a moderately long tail and a coat of gray-brown fur scattered with small pale spots, as if flecked with light. The effect is softer than the bold spotting of some western squirrels, but in range it is distinctive. It carries itself slim and alert, often upright at the burrow entrance like others of its kind.

The main confusion risk is Townsend’s ground squirrel, which is smaller and paler and shares parts of the Columbia Basin. Where the two meet, the Washington ground squirrel’s larger size, longer tail, and speckled back are the tells. Columbian ground squirrels are bigger still and carry rusty tones this species lacks.

Deep soil at the dry edge

This squirrel is a creature of the shrub-steppe, tied to deep, silty soils where it can dig long burrow systems among sagebrush and bunchgrass. Those same deep soils are exactly what farmers prize, which is the root of the species’ story: most of its native ground was plowed for wheat and orchard country over the twentieth century, and the squirrel was squeezed into the leftovers.

Its active season is short. It emerges in late winter, breeds early, and retreats underground by summer to escape the baking heat, sleeping through the rest of the year. Reports follow that pulse, peaking in spring and collapsing by midsummer. A traveler in August sees empty shrub-steppe; the squirrels are all below, waiting out the heat and then the winter in one long dormancy.

Down to the remnants

By the late twentieth century the Washington ground squirrel had declined enough to earn emergency state protection, and Oregon’s small population hangs on in a few colonies near the Columbia River. The IUCN lists the species as Near Threatened. Habitat conversion did the damage, and the pressures haven’t vanished: development, fire, and invasive grasses keep nibbling at the remaining shrub-steppe.

The record pattern tells that story honestly. Clusters sit where blocks of native or restored ground survive, and the empty spaces between are mostly farmland. Records are not a census, but for a species this localized, each cluster marks a real stronghold. The squirrel’s future rides on whether those strongholds stay connected, a question land managers in two states are actively working.

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
  • PhyloPicCC0 / CC-BY per itemthe to-scale silhouettesAndy Wilson (Urocitellus) · Andrew A. Farke (human silhouette, CC-BY 3.0)
  • IUCN Red Listattributed factthe global conservation status