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mustelidae
The Mustelidae (from Latin ''mustela'', weasel) are a family of carnivorous mammals, including the otters, badgers, weasel, martens, ferrets, minks and wolverines. Mustelids are diverse and the largest family in the order Carnivora. The internal classification is still disputed, with rival proposals containing between two and eight subfamilies. One study, published in 2008, questions the long-accepted Mustelinae subfamily, and suggests that Mustelidae consist of four major clades and three much smaller lineages.
== Variety ==
Mustelids vary greatly in size and behaviour. The least weasel is not much larger than a mouse, while the giant otter can measure up to in length and sea otters can exceed in weight. The wolverine can crush bones as thick as the femur of a moose to get at the marrow, and has been seen attempting to drive bears away from their kills. The sea otter uses rocks to break open shellfish to eat. The marten is largely arboreal, while the badger digs extensive networks of tunnels, called setts. Some mustelids have been domesticated: the ferret and the tayra are kept as pets (although the tayra requires a Dangerous Wild Animals licence in the UK), or as working animals for hunting or vermin control. Others have been important in the fur trade—the mink is often raised for its fur.
As well as being one of the most species-rich families in the order Carnivora, the family Mustelidae is one of the oldest. Mustelid-like forms first appeared about 40 million years ago, roughly coinciding with the appearance of rodents. The direct ancestors of the modern mustelids first appeared about 15 million years ago.
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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