Name for a variety of hopping marsupials, or pouched mammals, found in Australia, Tasmania, and New Guinea. Kangaroos have powerful hind legs designed for leaping, long feet, short forelimbs, and long muscular tails. The hind legs are also used to deliver blows at enemies when the animal is cornered; the feet are sharply clawed. The single young is born in an immature state and is suckled in the mother's pouch for about six months.