These kangaroos, yorry in Jirrbal, are the symbol of Australian wildlife. They hop around Australia, just as they hop into our hearts. The Wet Tropics region is home to about a third of Australia's 315 mammal species including 13 species of mammal which are found nowhere else in the world. As well as mammals like the wallaby and platypus which are widespread over Australia, the Wet Tropics is home to two tree-kangaroos, a rat-kangaroo and four ringtail possums. The Lumholtz's and Bennett's tree-kangaroos of the Wet Tropics are only 60cm tall and their tails are almost a metre long. They spend most of their time in the tree canopy feeding on fruit and leaves. If you are lucky enough to spot one, you may see a small brown ball high in the treetops or a long, brown furry tail disappearing into the undergrowth. In fact you may not see them at all, hearing instead a sudden crash of leaves and branches as they flee.