Montana mammals

Prairie Vole in Montana

Microtus ochrogaster

Native to Montana S4 Apparently Secure in Montana

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

Prairie Vole in Montana, by the numbers

Common in Montana 37th most recorded of 122 mammals logged in Montana

167 occurrence records

Records from 2000–2026.

167 total records count every Montana occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 164; the monthly chart covers the 163 records with a full observation date.

When to look for the Prairie Vole in Montana

Most sightings fall in August.

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

Monthly Montana records (table)
MonthRecords
January2
February0
March17
April8
May6
June45
July10
August46
September22
October2
November1
December4

Monthly prairie vole occurrence records (iNaturalist and GBIF) in Montana, 2000–2026.

Seasonality

Year-round in Montana, with recorded sightings peaking in August, with a smaller rise in June.

Occurrence map

Where Prairie Vole has been recorded in Montana

164 records mapped · zoom and drag to explore

164 Montana records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Montana State Trust Lands 10
Custer National Forest 1
Helena National Forest 1
Upper Missouri River Breaks National Monument 1

Protected places with the most prairie vole 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 Montana

CountyRecords
Phillips County 34
Powder River County 23
Chouteau County 16
Yellowstone County 14
Big Horn County 13
Dawson County 13
Hill County 11
Carter County 6
Carbon County 5
Petroleum County 5
Rosebud County 5
Richland County 4
9 other counties 18

The complete county distribution, spread across 21 Montana counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Montana sits at the western edge of the prairie vole’s range, which centers on the Great Plains from Texas north into the Dakotas. That geography helps explain why the state has only 167 mapped records, a fraction of what turns up in core prairie states, all logged through GBIF rather than iNaturalist photo reports.

The listed locations, Red Rock Lakes National Wildlife Refuge, Flathead Lake, and the Missouri River corridor, all offer the open grassy ground this vole needs; it lives in loose colonies of shared burrows rather than alone, so a good patch of grassland can hold several family groups at once.

Records peak in June and August, with a smaller bump earlier in spring. Given how few total records exist, that pattern is better read as a rough hint than a firm seasonal trend. NatureServe ranks the species S4, Apparently Secure, in Montana, a healthier status than the low record count alone might suggest.

More mammals in Montana 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"