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In Oregon, the nutria is considered an invasive species. The nutria is a large rat-like semiaquatic rodent. The species has a hunched body; a round, nearly hairless tail; a valvular mouth and nose; and pentadactyl feet with naked soles. The toes of the hind feet, except for the hallux, are included in a web. As an adaption to the aquatic environment, the eyes, nostrils, and small ears are set high on the sides. The pelage consists of long, course guard hairs and soft, dense underfur. Overall, the color usually ranges from dark brown to yellow-brown. The muzzle is frosted with

The Wolverine is the largest terrestrial mustelid in Oregon that, to some degree, resembles a small bear. It is powerfully built with a broad, dog-like head; short round ears; small eyes; a slightly humped back; relatively short legs and a bushy, somewhat drooping tale. The pelage consists of a dense, wooly, crimped under fur overlain by course, stiff and somewhat shaggy guard hairs. Fur on the tail is about twice as long as on the body. The base color is blackish brown with a pale brown stripe extending along the sides from the head or shoulders to the base of

The Canada lynx is only slightly larger than the bobcat. Nevertheless, long legs and long fur produce the illusion that the lynx is considerably larger than it actually is. Documented accounts of wild lynx are rare and lynx are not expected to currently reside in Oregon. However, if lynx were to be observed, it is likely to occur at higher elevations such as in the Cascade Range, Blue Mountains or Wallowa Mountains. Habitats used by lynx often are defined in terms of habitats used by their primary prey species, thus good snowshoe hare habitat usually is considered to be good

The mountain goat is a stockily built bovid with black scimitar-shaped horns, large black hooves and prominent dew claws, and an entirely white, wooly pelage. Sometimes the pelage contains scattered brown hairs on the dorsum and rump. A long beard, pointed ears, and a squarish muzzle are also characteristic. Males are larger, and have longer, larger-diameter, and more evenly curved horns that females. Mountain goats are denizens of high altitudes, remote, and barren montane regions where they are capable of moving through exceedingly rugged and precipitous terrain with speed and agility. Nevertheless, mountain goats are known to fall occasionally, whereupon

The mule deer is the larger member of the genus in Oregon. The ears are long, the metatarsal gland is surrounded by hairs similar in color but considerably longer than those on the remainder of the metatarsus, and the tail is short and constricted basally. Among adult males, the antlers are dichotomously branched with tines of approximately equal length. In winter, the basic pelage color is cinnamon buff. The chest is nearly black at the midline grading to grayish on the sides. The nose, sides of face, chin, and throat are whitish to pale buff. Spots of black occur immediately

The Columbian white-tailed deer is the smallest cervid in Oregon. The most distinguishing feature is the long, wide tail that can easily be seen, especially when raised when startled. The tail is brown dorsally with a white fringe, and white ventrally. In males, antlers with tines typically arise from a single main beam. In winter, the pelage is a dark buffy-gray and consists of relatively long, thick, and somewhat brittle hairs; in summer, the pelage is lighter with more tawny tones and is shorter and thinner. The midline of the dorsum is darker and the fade lighter; in males, the