Beringian Ermine

About this species

Diet

Primarily rodents and lagomorphs; also birds, fish, shrews, and occasional reptiles or amphibians

Habitat

Northern temperate and boreal landscapes

Range

Eurasia and Alaska under the modern restricted species concept

The stoat, or Eurasian ermine, is a slender mustelid with short legs, a long neck, and a tail ending in a black tip. Summer animals are brown above and pale below; across colder parts of the range the coat turns white in winter while the black tail tip remains. This combination separates a winter stoat from the least weasel, whose tail lacks the persistent black end. A 2021 revision restricted Mustela erminea to Eurasia and Alaska, separating most North American populations as M. richardsonii and an island form as M. haidarum. (Wikipedia, general species account)

Mouse-like rodents dominate the diet, but stoats also take pikas, hamsters, water voles, rabbits, birds, fish, and shrews, with reptiles, amphibians, and insects eaten less often. Their narrow bodies let them pursue prey into burrows, and males more often tackle large prey than females. The opened source confirms a broad Eurasian range but did not provide a concise Mongolia-specific habitat, breeding schedule, or named locality suitable for this account. Those points are therefore omitted rather than borrowed from European populations or from the recently separated American ermine. (Wikipedia, general species account)

Description: Wildlife of Mongolia guide, Wildlife of Everywhere (wildlifeofeverywhere.com); general species information paraphrased from Wikipedia (CC BY-SA)