Wyoming mammals

Thirteen-lined ground squirrel in Wyoming

Ictidomys tridecemlineatus

Native to Wyoming S5 Secure in Wyoming

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

Thirteen-lined ground squirrel crouched beside short grassThirteen-lined ground squirrel standing upright in prairie grassThirteen-lined ground squirrel rising from green lawn grassThirteen-lined ground squirrel peering from a burrow entranceThirteen-lined ground squirrel close portrait in dry grass
Photo: sofi v · CC-BYThirteen-lined ground squirrel crouched beside short grassPhoto: carterdorscht · CC0Thirteen-lined ground squirrel standing upright in prairie grassPhoto: Lauren McLaurin · CC-BYThirteen-lined ground squirrel rising from green lawn grassPhoto: Millie Basden · CC-BYThirteen-lined ground squirrel peering from a burrow entrancePhoto: Sean Frey · CC-BYThirteen-lined ground squirrel close portrait in dry grass

Thirteen-lined ground squirrel in Wyoming, by the numbers

Occasional in Wyoming 65th most recorded of 126 mammals logged in Wyoming

261 occurrence records
50 with iNaturalist photos
May 8, 2026 Last seen in Wyoming

Records from 2000–2026.

When to look for the Thirteen-lined ground squirrel in Wyoming

Most sightings fall in July.

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

Monthly Wyoming records (table)
MonthRecords
January4
February0
March3
April17
May13
June49
July92
August39
September27
October13
November3
December1

Monthly thirteen-lined ground squirrel occurrence records (iNaturalist and GBIF) in Wyoming, 2000–2026.

Seasonality

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

Occurrence map

Where Thirteen-lined ground squirrel has been recorded in Wyoming

261 records mapped · zoom and drag to explore

261 Wyoming records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Devils Tower National Monument 2
Jacoby Golf Course 1
State Lands 1111112898 1
Thunder Basin National Grassland 1
Chain Lakes Wildlife Habitat Management Area 1
State Lands 1111111247 1

Protected places with the most thirteen-lined ground squirrel 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 Wyoming

CountyRecords
Albany County 75
Carbon County 40
Sweetwater County 38
Laramie County 32
Crook County 17
Campbell County 11
Natrona County 7
Converse County 7
Weston County 7
Platte County 6
Goshen County 6
Lincoln County 5
5 other counties 10

The complete county distribution, spread across 17 Wyoming counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Thirteen-lined ground squirrel records in Wyoming concentrate around Devils Tower National Monument and Medicine Bow National Forest’s open grassland edges, the short-grass prairie and pasture habitat this ground squirrel favors over forest or dense shrub.

Reports build through spring and peak at 92 in July before dropping off through fall, tracking this ground squirrel’s active season above ground before it retreats underground for winter hibernation. NatureServe ranks the species S5, Secure, statewide.

Occurrence data from iNaturalist and GBIF.

Thirteen-lined ground squirrel crouched beside short grass
Full species profile Thirteen-lined ground squirrel Ictidomys tridecemlineatus Size 17–30 cm6.7–11.8 in Weight 173 g6.1 oz Lifespan Up to 7.9 yr View the full profile

More mammals in Wyoming 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"