The cane toad is one of the most disastrous biological blunders in Australian history. Originally introduced to Queensland in 1935 to control beetles on sugarcane plantations, the toads didn't eat the beetles. Instead, they quickly multiplied and became a toxic, invasive menace. These massive, poisonous amphibians have ravaged native ecosystems. They secrete a potent toxin from glands on their shoulders that is lethal to nearly any predator that tries to eat them—from quolls and snakes to freshw