Wyoming mammals

Southwestern Jumping Mouse in Wyoming

Zapus princeps

Native to Wyoming S3 Vulnerable 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.

Live western jumping mouse crouched in leaf litter with its long tail curving behindAI-generated image: Southwestern jumping mouse crouched in streamside sedge. No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyAI-generated image: Southwestern jumping mouse on a wet willow bank. No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy
Photo: U.S. Forest Service · Public domainLive western jumping mouse crouched in leaf litter with its long tail curving behindAI-generated image No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracySouthwestern jumping mouse crouched in streamside sedgeAI-generated image No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracySouthwestern jumping mouse on a wet willow bank

Southwestern Jumping Mouse in Wyoming, by the numbers

Common in Wyoming 19th most recorded of 126 mammals logged in Wyoming

944 occurrence records

Records from 2000–2026.

944 total records count every Wyoming occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 935 records with a full observation date.

When to look for the Southwestern Jumping Mouse in Wyoming

Most sightings fall in July.

935 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
January2
February0
March0
April0
May6
June204
July514
August171
September36
October0
November0
December2

Monthly southwestern jumping mouse occurrence records (iNaturalist and GBIF) in Wyoming, 2000–2026.

Seasonality

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

Occurrence map

Where Southwestern Jumping Mouse has been recorded in Wyoming

300 records mapped · zoom and drag to explore

299 Wyoming records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Medicine Bow National Forest 100
Grand Teton National Park 42
Yellowstone National Park 30
Teton Wilderness 12
Absaroka-Beartooth Wilderness 7
Washakie Wilderness 5
North Absaroka Wilderness 4
Fossil Butte National Monument 2

Protected places with the most southwestern jumping mouse 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
Teton County 164
Carbon County 133
Park County 113
Lincoln County 105
Albany County 76
Converse County 67
Sublette County 66
Uinta County 57
Sheridan County 43
Fremont County 37
Big Horn County 29
Washakie County 15
4 other counties 39

The complete county distribution, spread across 16 Wyoming counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Wyoming’s 944 records all come from GBIF and cluster strongly in summer: July has 514, June 204, and August 171. The overlay points to Thunder Basin National Grassland, nearby state wildlife habitat areas, and high-plains stream corridors, while NatureServe ranks the mouse S3 (Vulnerable) in the state. Those totals map reported encounters rather than abundance and do not prove absence outside the recorded footprint.

Live western jumping mouse crouched in leaf litter with its long tail curving behind
Full species profile Southwestern Jumping Mouse Zapus princeps Size 22–25 cm8.7–9.8 in Weight 28 g1 oz Lifespan Up to 6 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"