Marsupials live in forests, plains, and deserts. They are found in the Americas, Australia, New Guinea, and some neighboring islands.There are about 260 different species of marsupials. Most can be classified into one of six groups. Two marsupial groups are found only in the Americas: (1) didelphids that include opossums and (2) caenolestids, the rat opossums of western South America. The other four marsupial groups are found in Australasia. The (3) macropods are kangaroos and wallabies. Phalangers (4) are called possums, but should not be confused with Americas' Opossums. Most (5) dasyurids are small, insect-eating mammals, but this group also includes a few carnivore marsupials. The (6) peramelids are bandicoots. That still leaves koalas and wombats, two other species.