Piute Ground Squirrel

Urocitellus mollis

Also known as: Great Basin Ground Squirrel

LCLeast Concern

Piute ground squirrels are pale, compact squirrels of the Great Basin, where an inconspicuous coat helps them disappear into dry soil and sagebrush. Their year is strikingly compressed: they surface for the cool, productive months, then wait out heat and drought underground. Records from Nevada, Utah, and Idaho capture that short window and the species' basin-country range, but they show when animals were reported rather than how many live there.

Range through the year

Where Piute Ground Squirrel is seen

Piute Ground Squirrel is recorded in 4 US states from 106 occurrence records, most heavily in Utah (45 records) and Idaho (41).

Current range106 records · 4 states
AlabamaArizonaArkansasCalifornia · 3 records · view state pageColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdaho · 41 records · view state pageIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevada · 17 records · view state pageNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtah · 45 records · view state pageVermontVirginiaWashingtonWest VirginiaWisconsinWyomingAlaskaAKHawaiiHIPuerto RicoPR
Occurrence data by state and month
Piute Ground Squirrel – occurrence records by US state and month (106 total across 4 states)
StateJanFebMarAprMayJunJulAugSepOctNovDecYear
Utah·31391091·····45
Idaho··932········41
Nevada··4571······17
California···111······3

Based on 1,011 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

Piute Ground Squirrel across 4 states

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

  • UtahNativeOccasional535 records

    State rankApparently Secure

    Notable placesCamp Floyd State Park · State Trust Lands Gunnison Block · State Trust Lands I-80 Block · Fort Deseret State Park

    Countiesrecorded in 11

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

  • IdahoNativeCommon292 records

    State rankApparently Secure

    Notable placesCraters Of The Moon National Monument

    Countiesrecorded in 13

    Year-round in Idaho, with recorded sightings peaking in April–June.

  • NevadaNativeOccasional162 records

    State rankApparently Secure

    Notable placesToiyabe National Forest · Little High Rock Canyon Wilderness Area

    Countiesrecorded in 12

    Year-round in Nevada, with recorded sightings peaking in April–June.

  • CaliforniaNativeRare22 records

    State rankVulnerable

    Notable placesInyo National Forest

    Countiesrecorded in 3

    Year-round in California, with recorded sightings peaking in May–June.

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.

SizePiute 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
25–29 cm10 in–12 in
Weight
82–205 g2.9–7.2 oz

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

Elevation

From 200 georeferenced records, the Piute Ground Squirrel is recorded from 733 m2,405 ft to 2,068 m6,785 ft, with half of sightings below 1,408 m4,619 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 peakApril31 records

Seasonality from research-grade observation dates across the US (31 records, all years). Reflects when the species is recorded, not a guarantee of presence.

Best encounter

Where and when to see a Piute Ground Squirrel

Your best chance: Utah, in April.

Where
UtahUT
When
April

Life history

The Piute Ground Squirrel (82–205 g2.9–7.2 oz) is an omnivore that first breeds around 1 years, carries a 24-day gestation, and bears about 8.4 young per litter. Maximum recorded longevity is 3.5 years.

Life cycle

  1. Gestation24 days
  2. Birthlitter of 8.4 young
  3. Sexual maturity1 yr (female)
  4. Maximum recorded longevity3.5 years

Reproduction

Gestation
24days
Litter size
8.4youngaverage
Litters / year
1litter
Age at first breeding
1years

Diet composition

Omnivore

By foraging composition: 40% plant material, 40% seeds & grain, 20% invertebrates.

  • Plant material40%
  • Seeds & grain40%
  • Invertebrates20%

Most active during the day.

Typical values for the species, not local measurements. Maximum longevity is the longest lifespan on record; most individuals live far less.

Commonly confused with

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

A squirrel matched to pale desert ground

Piute ground squirrels have a brownish-gray coat without bold stripes. Their ears and tail look small and understated, preserving the low, compact outline of a burrowing animal. That plain appearance blends with dry Great Basin soils but makes identification difficult where other small ground squirrels overlap.

Color alone isn’t enough. A useful identification combines the unstriped back, short tail, small ears, and location. Clear photographs matter because posture can make almost any western ground squirrel look similar at a distance.

The short green season

These squirrels are active above ground when cool weather and fresh plant growth coincide. They eat leaves, stems, roots, bulbs, flowers, and seeds, with insects or other animal material adding variety. During hotter parts of a day, shade and the burrow provide relief.

The burrow is more than a refuge from a passing predator. It buffers desert temperatures and provides the secure space needed for long dormancy. A squirrel may plug an entrance with soil, reducing exposure while it rests below ground.

Reports rise sharply in spring and fade by midsummer. That pattern matches visibility during the aboveground season. It doesn’t mean the animals leave their home range afterward; most simply become unavailable to observers.

Where sagebrush and soil meet

Piute ground squirrels occupy basins and valleys across the Great Basin. Sagebrush, open grassland, field margins, and other low vegetation provide feeding places and sightlines. Stable colonies also need soil that can hold a burrow system.

Records center on Nevada, Utah, and southern Idaho in the current dataset. Taxonomic boundaries and uneven reporting complicate the wider picture, especially where closely related ground squirrels meet. A gap between record clusters may reflect hard ground, unsuitable vegetation, poor access, or limited survey work.

The elevation spread reaches from low desert basins into cooler uplands. Plant timing changes along that climb, so emergence and retreat won’t happen everywhere on the same dates.

Breeding before the landscape dries

Breeding follows emergence, giving young a chance to grow while green food remains available. Females raise their litter in an underground nest. Juveniles must begin feeding above ground and prepare for dormancy within the same narrow seasonal window.

That schedule links reproduction closely to rainfall and temperature. A productive spring can extend good feeding conditions, while drought may shorten them. Calendar dates alone can’t describe the cycle across the whole range.

Ground squirrels also connect desert food webs. Raptors, snakes, foxes, badgers, and other hunters use them as prey. Their digging moves soil and creates underground structure, so their influence continues even when no squirrel is visible.

What occurrence records can and can’t show

The Piute ground squirrel is listed as Least Concern, but that broad category doesn’t guarantee every colony is secure. Development, intensive ground disturbance, altered plant cover, and severe fire can reduce the combination of food and diggable soil.

Occurrence reports document encounters, not abundance. Spring clusters partly reflect the only period when observers can readily see the animals. Monitoring the same places over many years provides a stronger signal than comparing raw report totals from sites with different access or attention.

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)
  • AnAge (HAGR)CC-BY 3.0longevity, maturity, and gestation figures
  • IUCN Red Listattributed factthe global conservation status
  • Amniote Life-History DatabaseCC0 · public domainreproduction figures
  • EltonTraitsCC0 · public domaindiet and foraging-activity data