Opossums have a heavy set body that resembles a large house cat. They have a long head with a pointed snout. Their faces have long whiskers. All opossums have long, tapered tails with a scaly appearance. Females have a fur-lined pouch to carry their young (Baker 1983). The color of the opossum varies by the region. Northern populations have thick underfur that is white in color and has black tips. The pale guard hairs give the opossum a gray appearance. In southern populations, the underfur is much sparser. Both northern and southern populations have white cheek hairs (McManus 1974). Total length varies between 350 and 940 mm, tail length varies between 216 and 470mm. Males are larger than females with male weight ranging from 0.8 to 6.4 kg and female weight ranging from 0.3 to 3.7 kg (Wilson and Ruff 1999).