American ermine holds a substantial 273-record showing in Idaho, clustered around Deer Flat and Camas national wildlife refuges and the Snake River corridor’s wetland and river-edge cover, where this small weasel hunts voles and other rodents along brushy margins.
Records spike sharply in November, 96 of the year’s total, alongside smaller peaks in January and September, an unusual pattern that likely tracks winter trapping-survey timing as much as the ermine’s own activity, since its white winter coat also makes it easier to spot against early snow.
Full species profile
