The cane toad is a large, warty, poisonous amphibian native to South and Central America and considered to be one of the worst invasive species in the world. They were introduced in many countries with the hope that they would help control agricultural pests. The toads failed at controlling insects, but they turned out to be remarkably successful at reproducing and spreading themselves.

Their diet consists largely of insects, but they'll eat almost anything, including small birds, other reptiles and amphibians, and small mammals.

In 1935, at the request of sugarcane plantation owners, the government released about 2,400 cane toads into north Queensland to help control cane beetles, which eat