Indiana mammals

Muskrat in Indiana

Ondatra zibethicus

Native to Indiana S5 Secure in Indiana

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

Muskrat in Indiana, by the numbers

Common in Indiana 10th most recorded of 74 mammals logged in Indiana

587 occurrence records
572 with iNaturalist photos

Records from 2000–2026.

587 total records count every Indiana occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 581 records with a full observation date.

When to look for the Muskrat in Indiana

Most sightings fall in March to May.

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

Monthly Indiana records (table)
MonthRecords
January17
February36
March106
April128
May96
June49
July35
August20
September17
October23
November26
December28

Monthly muskrat occurrence records (iNaturalist and GBIF) in Indiana, 2000–2026.

Seasonality

Year-round in Indiana, with recorded sightings peaking in March–May.

Occurrence map

Where Muskrat has been recorded in Indiana

300 records mapped · zoom and drag to explore

299 Indiana records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Indiana Dunes National Park 43
Little Grassy (Grassie) Pond Game Management Area 10
Goose Pond Fish And Wildlife Area 9
Willow Slough Fish And Wildlife Area 6
Lasalle State Fish And Wildlife Area 6
Summit Lake State Park 5
Spring Mill State Park 3
Prophetstown State Park 3

Protected places with the most muskrat 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 Indiana

CountyRecords
Tippecanoe County 108
Marion County 67
Allen County 51
Porter County 44
Lake County 36
St. Joseph County 35
Hamilton County 31
Monroe County 18
Elkhart County 15
Jackson County 14
Vigo County 12
Vanderburgh County 12
37 other counties 144

The complete county distribution, spread across 49 Indiana counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Indiana muskrat records follow marshes, ponds, drainage ditches, and slow water, with promising public habitat in the wetlands of Indiana Dunes and Kankakee Sands and around Pokagon’s glacial lakes. Reports peak from March through May, when open water and fresh shoreline activity make muskrats and their lodges easier to notice.

The 571 iNaturalist records are encounters, not an abundance survey. Wetlands beside trails and roads receive much more attention than farm ditches and inaccessible marsh interiors, so gaps and clusters in Indiana records partly reflect where observers can reach the water.

Occurrence data from iNaturalist and GBIF.

Muskrat in other states

More mammals in Indiana 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"