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Date/Time Thumbnail Dimensions User Comment; current: 19:25, 15 June 2011: 533 × 396 (309 KB): Mariomassone {{Information |Description=Least weasel, stoat and European polecat |Source=Practical game-preserving: a complete guide to the rearing and preservation of both winged and ground game, and the destruction of vermin |Date=1906 |Author=Carnegie, W |Permissio
Richardson's stoat M. r. richardsonii. Bonaparte, 1838 Similar to M. r. cigognanii, but larger, with a dull chocolate brown summer coat [10] Newfoundland, Labrador and nearly all of Canada (save for the ranges of other American stoat subspecies) imperii (Barrett-Hamilton, 1904) microtis (J. A. Allen, 1903) mortigena (Bangs, 1913) Baffin Island ...
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 ...
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 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.
Skulls of a long-tailed weasel (top), a stoat (bottom left) and least weasel (bottom right), as illustrated in Merriam's Synopsis of the Weasels of North America. The long-tailed 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.
Sthenictis sp. (American Museum of Natural History). Mustelids vary greatly in size and behaviour. The smaller variants of the least weasel can be under 20 cm (8 in) in length, while the giant otter of Amazonian South America can measure up to 1.7 m (5 ft 7 in) and sea otters can exceed 45 kg (99 lb) in weight.
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.