Wisconsin’s ermine record spans marsh-and-meadow complexes such as Horicon and Necedah as well as the wooded floodplain of the Upper Mississippi refuge. Reports rise in June and again in November–December, when dispersal, the change to a white winter coat, and tracks on early snow can make this otherwise secretive predator easier to detect.
All 67 mapped records here come from GBIF rather than iNaturalist, so they reflect specimen and institutional reporting especially strongly. They confirm Wisconsin occurrence but are not an abundance estimate; survey effort, collection history, and uneven access can produce apparent gaps unrelated to the number of ermines present.
Full species profile
