Remote and isolated, the islands of the South Pacific have a life of their own. Animals have been living in seclusion for so long, they've evolved in the most curious and surprising ways. But island living can carry a high price. Recently, some dramatic changes have been sweeping through these strange islands. At the western limits of the Pacific ocean, this is New Guinea, the world's largest tropical island. In these isolated jungles, there are creatures only recently discovered by westerners and mountains that they have never visited. This is the home of a mammal first seen by scientists as recently as 1994. Even the locals rarely see it, and it has never been filmed until now. It lives in trees, but it's not a monkey. Primates never made the jump across the water to this island. This is a rare glimpse of an almost unknown island oddity - the dingiso.