Papua New Guinea notable feature in common for the two landmasses is the existence of several species of marsupial mammals, including some kangaroos and possums, which are not found elsewhere. Papua New Guinea is a megadiverse country. Many of the other islands within PNG territory, including New Britain, New Ireland, Bougainville, the Admiralty Islands, the Trobriand Islands, and the Louisiade Archipelago, were never linked to New Guinea by land bridges. As a consequence, they have their own flora and fauna; in particular, they lack many of the land mammals and flightless birds that are common to New Guinea and Australia. Australia and New
New Guinea mangroves New Guinea mangroves The New Guinea mangroves is a mangrove ecoregion that covers extensive areas of the coastline New Guinea, the large island in the western Pacific Ocean north of Australia. The New Guinea mangroves cover an area of , particularly among the river mouths of the island's south coast. This ecoregion contains the greatest diversity of mangrove species in the world and they are an important habitat for wildlife. Areas of mangroves on the northern coast of New Guinea can be found at the mouths of the Sepik and Ramu rivers on the eastern side of Cenderawasih Bay, and