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The short-tailed weasel is the common name in North America for two species once considered a single species: Stoat or Beringian ermine (Mustela erminea), native to Eurasia and the northern portions of North America; American ermine (Mustela richardsonii), found in most of North America aside from the northern areas
The stoat is similar to the least weasel in general proportions, manner of posture, and movement, though the tail is relatively longer, always exceeding a third of the body length, [clarification needed] [24] though it is shorter than that of the long-tailed weasel. The stoat has an elongated neck, the head being set exceptionally far in front ...
In the UK, the term "weasel" usually refers to the smallest species, the least weasel (M. nivalis), [1] the smallest carnivoran species. [ 2 ] Least weasels vary in length from 173 to 217 mm ( 6 + 3 ⁄ 4 to 8 + 1 ⁄ 2 in), [ 3 ] females being smaller than the males, and usually have red or brown upper coats and white bellies; some populations ...
Short-tailed weasel. Order: Carnivora Family: Mustelidae Wolverine, Gulo gulo, alpine, coniferous forests, rare; North American river otter, Lontra canadensis, rivers ...
The least weasel is the product of a process begun 5–7 million years ago, when northern forests were replaced by open grassland, thus prompting an explosive evolution of small, burrowing rodents. The weasel's ancestors were larger than the current form, and underwent a reduction in size to exploit the new food source.
Short-tailed weasel. Order: Carnivora, Family: Mustelidae Wolverine, Gulo gulo, alpine, r; North American river otter, Lontra canadensis, c; Pacific marten, Martes ...
Six extant mustelid genera left-to-right, top-to-bottom: Martes, Meles, Lutra, Gulo, Mustela, and Mellivora Mustelidae is a family of mammals in the order Carnivora, which includes weasels, badgers, otters, ferrets, martens, minks, and wolverines, and many other extant and extinct genera.
The habitat for the Haida ermine has been intensively reduced over the past few centuries due to old-growth timber harvest in the Tongass National Forest, an important protected area for the species, as well as industrial-scale mining on the islands, which disproportionately affects insular endemics such as M. haidarum.