The least weasel is the smallest meat-eater on Earth, a fierce little hunter slim enough to follow a meadow vole down its own tunnel. Missouri sits near the southern edge of its range, and the state has no least weasel records dated from 2000 to 2026. Older records, outside that window, came mostly from Nodaway County, up in the northwestern corner pressed against the Iowa line, with a few others scattered across the northern tier and one outlier in Moniteau County.
A pile-up like Nodaway County’s usually signals concentrated survey work rather than a weasel stronghold, and with no recent records, there’s no way to tell whether the species still holds that corner. The older picture fits the bigger pattern of the species: the least weasel is a northern animal, and in Missouri it belongs to the cooler northern counties. NatureServe ranks it vulnerable in the state.
Least weasels stay active all winter, hunting under the snow and through rodent tunnels, so they spend much of the year out of sight.
Full species profile
