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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 ...
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.
Yellow-bellied weasels eat birds, mice, rats, voles, and other small mammals. [citation needed] Yellow-bellied weasels first build a den in the ground. Breeding occurs annually. Mating occurs in late spring or early summer. Females are pregnant for about ten months. The female gives birth to 3–18 kits in April or May.
Siberian weasel fur is also used to make the so-called kolinsky sable-hair brush. In China, their orange fur is largely used to create ink brushes for calligraphers. The name of the brush is thus 狼毫筆, lit. 'wolf hairs brush', as a reduction from 黃鼠狼 + 毫 + 筆, lit. "yellow rat wolf" "hairs" "brush". Their hairs are appreciated ...
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.
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.
The back-striped weasel (Mustela strigidorsa), also called the stripe-backed weasel, is a weasel widely distributed in Southeastern Asia. It is listed as Least Concern on the IUCN Red List in view of its presumed large population, occurrence in many protected areas, apparent tolerance to some degree of habitat modification and hunting pressure.
It is the biggest nature reserve in Kazakhstan, and includes about 52 species of mammals, including the Altai weasel and also the food of the weasel, the pika. [8] Although no specific conservation strategy or program is dedicated to the Altai weasel, many other programs include it or it gains advantage.