Wisconsin’s ermine record spans marsh country such as the Horicon Wildlife Area as well as northern forest in Chequamegon National Forest and Northern Highland State Forest. Reports rise in May and June and again in November and December, when dispersal, the change to a white winter coat, and tracks on early snow can make this otherwise secretive predator easier to detect.
Nearly all of the 85 records, 81 of them, are iNaturalist observations, so they mostly reflect where people happen to be out looking. 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
