Fauna of New Guinea Guinea. However, the tree-kangaroos, which are mostly endemic to New Guinea, are different in appearance and behaviour. As suggested by their name, they are arboreal. They have long, thick tails which enable them to balance in trees, and large, strong forearms for gripping to trees. Two species of tree kangaroos are also found in Australia, they are believed to have migrated from New Guinea during the Pleistocene. The cuscus, family Phalangeridae, are a family of marsupials closely related to the possums of Australia. The cuscus have evolved in New Guinea, and are found throughout the island. Most species are dark
Fauna of New Guinea areas. The common Asiatic toad was accidentally introduced, and is very abundant in a small area in the north-west, and may be spreading further throughout the island. Frogs from the family Myobatrachidae are highly diverse and widespread in Australia. However, only seven described species have established in New Guinea. In Australia, the largest diversiy is seen in the subtropical and semi-arid environments, with the greatest diversity in the tropics occurring in savannah. New Guinea, however, is mostly covered in dense rainforest. The most common myobatrachid in New Guinea is the wokan cannibal frog ("Lechriodus melanopyga"). It is a small ground-dwelling