Kangaroos are marsupials living in Australia. Most kangaroos graze on the Australian plains, but tree kangaroos are arboreal; they climb trees and leap from branch to branch. Kangaroos generally have long, powerful hind legs and feet and a long tail, thickened at the base. The hind legs enable their spectacular leaps and are also useful for self-defense; the tail is used for balance. The head is small, the ears large and rounded, and the fur soft and woolly. Females have one young annually; it is suckled in its mother's pouch for six months and often returns to be carried in the pouch later as well. The gray kangaroo, the best-known and second-largest species, can leap more than 30 ft. The red kangaroo is the largest species; the male may stand 6 ft tall and weigh 200 lbs. Millions are killed annually for their meat and hides and because they compete with livestock for forage.
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