The nipples of female coypu are high on her flanks, to allow their young to feed while the female is in the water.Ī coypu is often mistaken for a muskrat, another widely dispersed, semiaquatic rodent that occupies the same wetland habitats. Three distinguishing features are a white patch on the muzzle, webbed hind feet, and large, bright orange-yellow incisors. They have coarse, darkish brown outer fur with soft dense grey under fur, also called the nutria. It is possible for coypu to weigh up to 16 to 17 kg (35 to 37 lb), although adults usually average 4.5 to 7 kg (10 to 15 lb). Adults are typically 4–9 kg (9–20 lb) in weight, and 40–60 cm (16–24 in) in body length, with a 30 to 45 cm (12 to 18 in) tail. The coypu somewhat resembles a very large rat, or a beaver with a small tail. In Brazil, the animal is known as ratão-do-banhado (big swamp rat), nútria, or caxingui (the last from the Tupi language). In Swedish, the animal is known as sumpbäver (marsh/swamp beaver). In Italy, instead, the popular name is, as in North America and Asia, "nutria", but it is also called castorino ("little beaver"), by which its fur is known in Italy. In German, it is known as Nutria, Biberratte (beaver rat), or Sumpfbiber (swamp beaver). In Dutch, it is known as beverrat (beaver rat). In France, the coypu is known as a ragondin. To avoid this ambiguity, the name "coypu" or "coipo" (derived from the Mapudungun language) is used in Latin America and parts of Europe. The name "nutria" (from Spanish word nutria, meaning 'otter') is generally used in North America, Asia, and throughout countries of the former Soviet Union however, in most Spanish-speaking countries, the word "nutria" refers primarily to the otter. Two names are commonly used in English for Myocastor coypus. Literally, therefore, the name Myocastor means "beaver rat". The genus name Myocastor derives from the two Ancient Greek words μῦς ( mûs), meaning "rat, mouse", and κάστωρ ( kástōr), meaning "beaver". Antifungal activities of origanum oil against Candida albicans.
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