Where did they come from
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The cane toad has mounted a successful invasion in Australia and many other countries - but where did the toad come from originally? These toads have a wide native range in Central America and South America. Studies on DNA characteristics of Aussie toads suggest that they descend from a group of toads originally collected from South America (perhaps French Guyana). These were taken to Puerto Rico, then toads from that island were taken to Hawaii – and finally, 101 Hawaiian toads were brought to Australia to form the beginnings of the invasion.
What hunts them?
Some predators have adapted to learn how to eat the cane toad without being poisoned. Since the poisonous glands are located on the back of the head, eating the frog's tongue or belly is safe for some animals. Keelback snakes and saw-shelled turtles feed on the tadpole and can handle low levels of cane toad toxins. Predators that have adapted to eat the adult cane toad include birds such as the heron, crow and kite, some species of rat and the estuarine crocodile. But humans would be their greatest hunter