Iowa mammals

Prairie Vole in Iowa

Microtus ochrogaster

Native to Iowa S3 Vulnerable in Iowa

Not listed as nonindigenous in Iowa by USGS NAS; native to its Iowa 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 Iowa, by the numbers

Rare in Iowa 52nd most recorded of 74 mammals logged in Iowa

204 occurrence records
5 with iNaturalist photos
Mar 13, 2024 Last seen in Iowa

Records from 2000–2026.

204 total records count every Iowa occurrence from GBIF and iNaturalist; the monthly chart covers the 201 records with a full observation date.

When to look for the Prairie Vole in Iowa

Most sightings fall in December.

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

Monthly Iowa records (table)
MonthRecords
January4
February3
March12
April9
May30
June5
July16
August30
September29
October18
November10
December35

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

Seasonality

Year-round in Iowa, with recorded sightings peaking in December, with a smaller rise in May and August–September.

Occurrence map

Where Prairie Vole has been recorded in Iowa

204 records mapped · zoom and drag to explore

204 Iowa records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Dudgeon Lake Wildlife Management Area 8
Loess Hill Wildlife Management Area 3
Mt. Ayr Wildlife Management Area 1
Springbrook State Park 1
Rathbun Wildlife Management Area 1
Backbone State Park 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 Iowa

CountyRecords
Fremont County 49
Benton County 15
Page County 15
Marion County 11
Mills County 10
Monona County 10
Cedar County 8
Pottawattamie County 8
Monroe County 8
Lee County 7
Story County 6
Mahaska County 6
31 other counties 51

The complete county distribution, spread across 43 Iowa counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Prairie voles carry a NatureServe S3 vulnerable rank in Iowa that sits in tension with a GBIF record of 203 specimens, more than 40 times the 5 iNaturalist sightings, a split that reflects how thoroughly trapping surveys have documented this grassland vole even as its tallgrass prairie habitat has shrunk statewide.

The handful of casually observed records cluster loosely in late winter and spring, February through May account for 4 of the 5 monthly-tallied sightings, though with GBIF dominating the total record so heavily, that pattern likely says more about survey timing than about the vole’s own seasonal activity, since prairie voles remain active under snow and vegetation cover year-round.

Occurrence data from iNaturalist and GBIF.

More mammals in Iowa in the atlas

Data & sources

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