American ermine, the short-tailed weasel that turns white in winter, holds 69 Wyoming records, all from GBIF, spread across the National Elk Refuge, Seedskadee National Wildlife Refuge, and the Yellowstone River corridor. That all-museum-and-survey-data profile, with zero iNaturalist entries, fits a small, fast-moving predator that’s rarely photographed even where it’s common.
Records climb through summer and peak at 22 in July, a pattern that likely tracks field survey timing rather than the ermine’s own activity, since this species hunts year-round beneath snow as readily as in open grass. Data here is thin enough that the seasonal pattern shouldn’t be read as a true activity calendar.
Full species profile
