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Muskrat skeleton Muskrat skull. An adult muskrat is about 40–70 cm (16–28 in) long, half of that length being the tail, and weighs 0.6–2 kg (1 + 1 ⁄ 4 – 4 + 1 ⁄ 2 lb). [13] That is about four times the weight of the brown rat (Rattus norvegicus), though an adult muskrat is only slightly longer.
ranging from just 5–8 cm (2.0–3.1 in) in length and 7 g (0.25 oz) in weight in the New World pygmy mouse up to 41–62 cm (16–24 in) and 1.1 kg (2.4 lb) in the muskrat. The length of their tails varies greatly in relation to their bodies, and they may be either furred or sparsely haired.
The muskrat or common muskrat [1] (Ondatra zibethicus) is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. Quick Facts Conservation status, Scientific classification ...
The most convenient distinguishing feature of the Arvicolinae is the nature of their molar teeth, which have prismatic cusps in the shape of alternating triangles. These molars are an adaptation to a herbivorous diet in which the major food plants include a large proportion of abrasive materials such as phytoliths; the teeth get worn down by abrasion throughout the adult life of the animal and ...
†Cope's muskrat [30] [36] †Ondatra hiatidens: Five specimens. A fossil species of muskrat, a semiaquatic type of herbivorous rodent endemic to Port Kennedy. It was originally named by Cope (1871), [30] though he later named the junior synonyms of Arvicola hiatidens and Anaptogonia cloacina in 1871 and 1899 respectively. [37]
The round-tailed muskrat is a semiaquatic and nocturnal species native to the southeastern United States. [3] Limited sexual dimorphism is seen among round-tailed muskrats, with female adults weighing an average of 262 grams (9.2 oz) and male adults measuring at a slightly heavier average of 279 grams (9.8 oz). [3]
Males tend to be larger than females. On average these animals are about 20–27 cm in total length (including the tail), with tails 6–10 cm long, and weigh 125-178 grams. The water vole is the second largest arvicoline in its range (after the muskrat). [5]
The word squirrel, first attested in 1327, comes from the Anglo-Norman esquirel which is from the Old French escurel, the reflex of a Latin word sciurus, which was taken from the Ancient Greek word σκίουρος (skiouros; from σκία-ουρος) 'shadow-tailed', referring to the long bushy tail which many of its members have.