in the northeast of the country is home to kangaroos that climb in the trees. The southern cassowary is the size of a human and is one of the largest birds on earth, with a strong beak and huge, clawed dinosaur feet that are deadly weapons. This is not your average bird. The largest crocodiles in the world, “salties,” are waiting for unsuspecting prey. They are huge reptiles that can grow up to 20 feet long and go without food for several months. Less menacing, but all the more bizarre, is a cuddly resident of the rain forest tops: the tree kangaroo! Rather than springing across the wide expanse of Australia, tree kangaroos jump through the rain forest from branch to branch — a sight that takes some getting used to.