Papua New Guinea in Motion 2
Papua New Guinea is one of earth’s mega diverse regions, and it owes much of its diversity to its topography. The mountainous terrain has spawned diversity in two ways: isolated mountain ranges are often home to unique fauna and flora found nowhere else, while within any one mountain range you will find different species as you go higher. In the lowlands are jungles whose trees are not that different from those of Southeast Asia. Yet the animals are often startlingly different – cassowaries instead of tapirs, and marsupial cuscus instead of monkeys.
The greatest diversity of animal life occurs at around 1500m above sea level. The ancestors of many of the marsupials found in these forests were derived from Australia some five million years ago. As Australia dried out they vanished from that continent, but they continued to thrive and evolve in New Guinea, producing a highly distinctive fauna. Birds of paradise and bowerbirds also abound there, and the forest has many trees typical of the forests of ancient Gondwana. As you go higher the forests get mossier and the air colder. By the time you have reached 3000m above sea level the forests are stunted and wreathed in epiphytes. It’s a formation known as elfin woodland, and in it one finds many bright honeyeaters, native rodents and some unique relics of prehistory, such as the giant long-beaked echidna. Above the elfin woodland the trees drop out, and a wonderland of alpine grassland and herbfield dominates, where wallabies and tiny birds, like the alpine robin, can often be seen. It is a place where snow can fall and where early morning ice coats the puddles.
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