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
Australia–Papua New Guinea relations In March 2005, Somare was required by security officers at Brisbane Airport, Australia, to remove his shoes during a routine departure security check. He took strong exception to what he considered a humiliation, leading to a diplomatic contretemps and a significant cooling of relations between the two countries. A protest march in Port Moresby saw hundreds march on the Australian High Commission, demanding an apology. In 2006, tensions between Papua New Guinea and Australia worsened due to the "Julian Moti affair". Moti, a close associate of Manasseh Sogavare, the then Prime Minister of the Solomon Islands, was arrested in Port