The brushtail possum that gets into roofs is only one of over 20 types of possum in Australia. They range in size from tiny ones as small as a mouse, to larger possums as big as small dogs. Often mistaken for rodents, many of these Australian possums are so secretive that most of us don't even know they exist.

Australia has been an island continent surrounded by oceans for millions of years. During this long, long time, its animals have evolved into species that are unique and precious. Covered with feathers, fur, spikes or scales, Australia's wild creatures can be beautiful, frightening and even dangerous. Although all Australians know what kangaroos or koalas look like and where they live, there are many other local animals whose ways of life are still a mystery, even to scientists. Find out about Australia's wonderful animals in this series, then look at them in a whole new way the next time you have a chance to get up close at a zoo, in the wild or in your own backyard.