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Siberian weasel
The Siberian weasel (''Mustela sibirica'') is a medium-sized weasel native to Asia, where it is widely distributed and inhabits various forest habitats and open areas. It is therefore listed as least concern on the IUCN Red List. It is also known as kolonok or kolinsky.
In form and hunting behaviour, the Siberian weasel represents a transitional form between small mustelids (such as stoats and least weasels) and their larger cousins (minks and polecats). It is a valuable furbearer, particularly for the paint brush industry.
==Description==
Siberian weasels have long, stretched out bodies with relatively short legs, but are more heavily built than solongois, stoats and least weasels. Their heads are elongated, narrow and relatively small, and their ears are broad at the base, but short. Their tails represent half their body length. Siberian weasels are much larger than stoats and solongois, and almost approach ferrets and minks in size. Adult males are 28–39 cm long, while females reach 25-30.5 cm. The tail in males reaches 15.5–21 cm in length, while that of females reaches 13.3-16.4 cm. Males weigh 650-820 g, while females weigh 360-430 g. Exceptionally large individuals have on rare occasions occurred in the Baraba steppe. The skull is in several respects intermediate in form between that of the stoat and the mink ; it is longer and larger than that of the stoat, but is somewhat more flattened than the mink's.
Their winter fur is very dense, soft and fluffy, with guard hairs reaching 3–4 cm in length. The underfur is dense and loose fitting. Siberian weasels are monotone in colour, being bright reddish-ocherous or straw-red, though orange or peach tones are sometimes noticeable on the skin. These tones are especially bright on the back, while the flanks and underbelly are paler. A dark, coffee-brown mask is present on the face. Their tails are more brightly coloured than the back, and are fluffier than those of other members of the genus. The lips and chin are white or slightly ochreous. The front of the muzzle is darker than the remaining parts of the head.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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