Cane frog was introduced into Australia's east coast on 1935, in hope to control the over growth scarab beetles. The cold blooded reptiles are not only over populated now, but have also evolved into bigger and faster creature, approximately two hundred million in numbers; they are slowly but surely destroying the ecologies of the continent. If their march westward is not dealt with, they would also kill all the native snakes, goanna lizards and quolls there with their poisonous nature. (Link)
Sound like they have to introduce another animal to control it again. What is it this time? maybe a mutated king cobra which immunes to the frog's venomous skin.