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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 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]
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.
"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 ...
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.
Long-tailed vole, Microtus longicaudus; Prairie vole, ... Least weasel, Mustela nivalis; Black-footed ferret, Mustela nigripes extirpated; Long-tailed weasel, ...
N. f. xanthogenys (California long-tailed weasel) North America, Central America, and northern South America Size : 28–42 cm (11–17 in) long, plus 11–30 cm (4–12 in) tail [ 121 ]
They have long, slender bodies, which enable them to follow their prey into burrows. Their tails may be from 34 to 52 mm (1 + 1 ⁄ 4 to 2 in) long. [3] Weasels feed on small mammals and have from time to time been considered vermin because some species took poultry from farms or rabbits from commercial warrens.