Knobs and Knockers
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Platypus Doorknocker. Platypuses are found only in Eastern Australia. The are excellent divers and swimmers, living on the edges of rivers and freshwater lakes where they feed on aquatic insect larvae, shrimps and worms. They are monotremes— mammals that lay eggs instead of giving birth. The male is the only venomous mammal in Australia—sharp spurs on his hind legs carry venom.