A wallaby is a name given to any small kangaroo. Both wallabies and kangaroos are from Australia. They can survive in very dry climates, and hop along on their back legs using their tail as a balance.
A yabby is a small crayfish that is found in creeks, rivers and billabongs in Australia. They can be caught and eaten in much the same way as larger crayfish.
A zombie, or living dead, is a dead body that can move around because of some form of magic. Zombies are typically very unfriendly and want to go around killing and eating people, particularly their brains. Zombies are frequently seen in horror movies and computer games.