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
Law of Papua New Guinea executive; nor are there any implications with respect to the quasi-judicial function of administrative tribunals, also an issue at one time in Australia (see Separation of powers in Australia). The principle was quickly tested in Papua New Guinea. In 1979, four years after Independence, the then-Minister of Justice, Mrs Nahau Rooney, wrote a widely circulated letter critical of what she perceived as a lack of sensitivity by the then entirely expatriate-personnel Supreme Court to a "growing national consciousness": in particular Mrs Rooney was impatient with the purportedly excessively legalistic approach of the Bench to the indigenising of the laws of