Richardson's Ground Squirrel

Urocitellus richardsonii

LCLeast Concern

Richardson's ground squirrel is the classic "gopher" of the northern plains, a stocky, short-tailed squirrel that stands like a fence post beside its burrow. It hibernates so long that adults may be above ground only a few months a year. In the United States its heartland is Montana and the Dakotas, and the records below show a range pressed right up against the Canadian border.

Range through the year

Where Richardson's Ground Squirrel is seen

Richardson's Ground Squirrel is recorded in 5 US states from 510 occurrence records, most heavily in Montana (255 records) and North Dakota (152).

Current range510 records · 5 states
AlabamaArizonaArkansasCaliforniaColorado · 2 recordsConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesota · 50 records · view state pageMississippiMissouriMontana · 255 records · view state pageNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth Dakota · 152 records · view state pageOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth Dakota · 51 records · view state pageTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyomingAlaskaAKHawaiiHIPuerto RicoPR
Occurrence data by state and month
Richardson's Ground Squirrel – occurrence records by US state and month (510 total across 5 states)
StateJanFebMarAprMayJunJulAugSepOctNovDecYear
Montana·216223497483042··255
North Dakota·1416197028914··152
South Dakota··32417121021··51
Minnesota··163814981··50
Colorado········2···2

Based on 1,664 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

Richardson's 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.

  • MontanaNativeCommon1,060 records

    State rankSecure

    Notable placesMontana State Trust Lands · Montana University System · Missouri Headwaters State Park · Loch Leven Fishing Access Site

    Countiesrecorded in 12

    Year-round in Montana, with recorded sightings peaking in June.

  • North DakotaNativeCommon420 records

    State rankUnranked

    Notable placesNd State Lands - Surface Ownership · Turtle River State Park · Chase Lake National Wildlife Refuge_Wilderness Area · Lewis And Clark State Park

    Countiesrecorded in 12

    Year-round in North Dakota, with recorded sightings peaking in June.

  • South DakotaNativeCommon116 records

    State rankSecure

    Notable placesLake Vermillion Recreation Area

    Countiesrecorded in 12

    Year-round in South Dakota, with recorded sightings peaking in June.

  • MinnesotaNativeOccasional65 records

    State rankVulnerable

    Notable placesMentor Prairie State Wildlife Management Area · Pipestone National Monument · Assiniboia State Scientific and Natural Area

    Countiesrecorded in 8

    Year-round in Minnesota, with recorded sightings peaking in July.

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.

SizeRichardson's 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
28–33 cm11 in–13 in
Weight
250–610 g0.6–1 lb

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

Elevation

From 200 georeferenced records, the Richardson's Ground Squirrel is recorded from 252 m827 ft to 2,564 m8,412 ft, with half of sightings below 1,158 m3,799 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 peakJune3,947 records

Seasonality from research-grade observation dates across the US (3,947 records, all years). Reflects when the species is recorded, not a guarantee of presence.

Daily activity clockDiurnal– most active during daylight hours

578 richardson's ground squirrel observations logged by hour of day. Activity is diurnal (most active during daylight hours), peaking around 10 AM.

12 AM: 1 observations1 AM: 2 observations2 AM: 5 observations3 AM: 2 observations4 AM: 0 observations5 AM: 1 observations6 AM: 6 observations7 AM: 15 observations8 AM: 46 observations9 AM: 39 observations10 AM: 58 observations11 AM: 43 observations12 PM: 53 observations1 PM: 34 observations2 PM: 38 observations3 PM: 52 observations4 PM: 43 observations5 PM: 39 observations6 PM: 35 observations7 PM: 34 observations8 PM: 19 observations9 PM: 6 observations10 PM: 5 observations11 PM: 2 observations12 AM6 AM12 PM6 PM

Based on 578 records (all years). Reflects when people record sightings, not only when the animal is active.

Hourly observation counts: 12 AM 1, 1 AM 2, 2 AM 5, 3 AM 2, 4 AM 0, 5 AM 1, 6 AM 6, 7 AM 15, 8 AM 46, 9 AM 39, 10 AM 58, 11 AM 43, 12 PM 53, 1 PM 34, 2 PM 38, 3 PM 52, 4 PM 43, 5 PM 39, 6 PM 35, 7 PM 34, 8 PM 19, 9 PM 6, 10 PM 5, 11 PM 2.

Best encounter

Where and when to see a Richardson's Ground Squirrel

Your best chance: Montana, in June, during the day.

Where
MontanaMT
When
June
Time
During the daydiurnal
Trophic relationshipsFood web What a Richardson's Ground Squirrel eats, and what eats it.
Eaten by6
Ferruginous HawkButeo regalisGray WolfCanis lupusRed-tailed HawkButeo jamaicensisCoyoteCanis latransAmerican BadgerTaxidea taxus taxusSwainson's HawkButeo swainsoni
This speciesRichardson's Ground Squirrel

Grazes on plants

Eats

A sample of documented feeding relationships, filtered to species that also occur in the US. Diet and predators vary by region and season, and this is not a complete list, many animals eat, and are eaten by, more than what has been formally recorded here.

Life history

The Richardson's Ground Squirrel (250–610 g0.6–1.3 lb) first breeds around 0.9 years, carries a 24-day gestation, and bears about 6.1 young per litter.

Reproduction

Gestation
24days
Litter size
6.1youngaverage
Litters / year
1litter
Age at first breeding
0.9years

Typical values for the species, not local measurements.

Commonly confused with

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

The flickertail up close

Locals call it the dakrat or flickertail, and both names fit. It is a thickset squirrel about 11 to 12 inches long, yellowish-gray to tan above with a pale belly, and it flicks its short, dark-fringed tail when alarmed. Farmers have called it a gopher for generations, but true gophers are pocket gophers, a different family entirely, and prairie dogs are heavier cousins with their own genus.

Within its range the main confusion is with other ground squirrels. The thirteen-lined ground squirrel is smaller and carries obvious stripes. The Franklin’s ground squirrel is darker and longer-tailed, an animal of taller grass. Richardson’s is the plain, pale one of open, short-grass country, and its upright sentinel pose at the burrow mouth is often the first thing a traveler notices.

Short grass, deep sleep

This squirrel wants open prairie, grazed pasture, roadsides, and the mown edges of towns: any place where the grass stays short enough that it can spot a predator coming. Its burrow systems riddle that ground, and its habit of standing tall beside them makes it one of the most conspicuous mammals of the plains.

The calendar is the remarkable part. Adult males vanish underground by early summer, females follow, and even the young are down by fall. Hibernation can stretch past seven months, and males emerge in late winter, sometimes while snow still covers the ground. The seasonal record shows it plainly: reports surge from March into early summer, then fade to near silence while most other mammals are still active. Some of that hush is real absence, a landscape full of sleeping squirrels.

Colonies, alarms, and a pest reputation

Richardson’s ground squirrels live in loose colonies where each animal knows its neighbors. A sharp whistle sends the whole town scrambling, and the squirrels discriminate among calls, reacting harder to some dangers than others. They eat grasses, forbs, and seeds, with insects and carrion mixed in, and they are themselves staple prey for hawks, badgers, coyotes, and weasels.

Their taste for crops and their burrowing in fields have made them targets of control campaigns for a century. Despite that pressure they remain widespread, and in places they have adapted readily to human-altered ground, colonizing pastures and town edges where short turf suits them.

Secure on the plains

The IUCN lists the species as Least Concern. Montana holds the densest cluster of US records, with North Dakota close behind and smaller numbers in South Dakota, Minnesota, and the Iowa edge of the range. Records thin toward the south and east not because the squirrel fails there but because its short-grass habitat does. It remains what it has long been: the background mammal of the northern prairie, abundant enough that most people who live beside it never learn its real name.

Data & sources

The data and visualizations on this page draw on these open sources: