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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.
The American marten is a long, slender-bodied weasel about the size of a mink with relatively large, rounded ears, short limbs, and a bushy tail. American marten have a roughly triangular head and sharp nose. Their long, silky fur ranges in color from pale yellowish buff to tawny brown to almost black.
A 2021 study into New World weasels determined that the genus Neovison would be merged with Amazon weasel, Colombian weasels and long-tailed weasels to form the new genus Neogale. [ 8 ] Fur-farmed mink are believed to have been descended from the Eastern mink ( Neogale vison vison ), the Kenai mink ( Neogale vison melampeplus ), and the Alaskan ...
"Mink, unlike short-tailed (ermine) and long-tailed weasels, do not have white pelage in winter but are typically a rich brown color and can have white patches on the chin, throat and sometime ...
The American ermine has a body plan typical of weasels. It has short legs, a long body and neck, and a small triangular head with short round ears. It has a brown dorsum with a white venter (except during winter when the coat is fully white) and a short, black-tipped tail. [2]
Neogale contains four species: the Amazon weasel (Neogale africana), the long and short-tailed weasels (N. frenata and N. lontra), and the American mink (N. vison). Native to the Americas, members of the genus can be found as far north as Alaska and as far south as Argentina and Bolivia.
American ermine, Mustela richardsonii Short-tailed weasel. Distribution: Maine, New Hampshire, Vermont, Massachusetts, Connecticut, and Rhode Island. Subspecies: Mustela richardsonii cicognanii according to Hall (1981) and Whitaker and Hamilton (1998). Long-tailed weasel, Neogale frenata Long-tailed weasel
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.