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 turtle ("Chelodina parkeri"), is restricted to the Fly River. The saltwater crocodile ("Crocodylus porosus") is the largest reptile native to New Guinea. It is a widely distributed species, from eastern India to northern Australia. It is found in most of New Guinea's rivers, except for those heavily disturbed by humans, or too small to accommodate the species. The other crocodile native to New Guinea, the New Guinea crocodile ("Crocodylus novaeguineae"), is an endemic. It is much smaller than the saltwater crocodile. A separate species may occur in southern New Guinea. New Guinea is within the Coral Triangle, the most species