Yvette Watt, based in Tasmania, had designed a set of cards made up of animals, fish, birds and insects who have at some time been declared pests or vermin. The set also includes locations and modes of transport, while the "wild cards" or jokers, are humans who can be given various roles such as scientist, hunter, politician or fisherman. While Yvette provides the cards, she does not supply any rules – it is up to the players to devise the rules, just as we humans do when it comes to our decisions on which animals are vermin, and which are not.