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muskrat

muskrat, North American aquatic rodent. The common muskrats, species of the genus Ondatra, are sometimes called by their Native American name, musquash. They are found in marshes, quiet streams, and ponds through most of North America N of Mexico, but are absent from the extreme W and SE United States. A common muskrat resembles a large house rat with its tail flattened on either side; its hind feet are partially webbed between the toes. Its outer fur is shiny brown, and it has a dense undercoat. Its body length is 10 to 14 in. (25–36 cm), excluding 8 to 10 in. (20–25 cm) of tail. Its shoulder height is about 5 in. (13 cm), and its weight is 2 to 3 lb (0.9–1.4 kg). A solitary dweller, it may live in a burrow in a steep bank or a reed hut built in marshy shallows. Muskrat burrows are constructed above water level and are connected to an underwater entrance by a tunnel; huts are built with an underwater opening. Muskrats do not build dams or fell trees as do beavers. They swim by paddling with the hind feet, using the tail as a rudder. They feed on vegetation and aquatic animals; their chief enemy is the mink. Mating occurs in spring and summer. The gestation period is about 30 days and the female bears several litters of two to six young each season. Muskrat fur is much used commercially, chiefly for women's coats. It is often dyed to resemble more expensive furs and is sold under a variety of names, including Hudson seal and river mink. The secretion of the musk glands is used in making perfume. Introduced into Europe for its pelts, the muskrat became a serious pest because its tunneling below water level undermines canal banks and dike foundations. The round-tailed muskrat, or Florida water rat, Neofiber alleni, is found in swampy regions of Florida and SE Georgia. It dives and swims well, but is less aquatic then the common muskrat, spending much time on land. It is about 12 in. (30 cm) long, including the long, scaly tail. It is about 2 in. (5 cm) high at the shoulder, and weighs about 3/4 lb (0.34 kg). Its feet are not webbed, and its tail is not flattened. Despite their greater size and longer tails, muskrats are closely related to voles. The water vole, Arvicola, found in most of Europe and N and W Asia, is an intermediate form; it is longer than other voles and in parts of its range leads an aquatic existance. Muskrats are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Rodentia, family Cricetidae.

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muskrat

muskrat Large, aquatic rodent (a type of vole) native to North America. It is a good swimmer, with partly webbed hind feet and a long, scaly tail. Its commercially valuable fur (musquash) is glossy brown and durable. Length, including tail: to 53.5cm (21in); weight: to 1.8kg (4lb). Family Cricetidae; species Ondatra obscura and O. zibethica.

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muskrat

musk·rat / ˈməˌskrat/ • n. a large semiaquatic North American rodent (Ondatra zibethicus, family Muridae) with a musky smell, valued for its fur. ∎  the fur of the muskrat.

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muskrat

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