The changes to the fauna were even more dramatic. Megafauna, species much larger than humans, disappeared, as well as many of the smaller species. About 60 different vertebrates became extinct, including the Diprotodon family (very large marsupials that looked rather like hippos), several large flightless birds, meat eating kangaroos, a five-metre lizard and Meiolania, a tortoise the size of a small car.