Native to: From Texas' Rio Grande Valley to Central Amazon and Peru.

Introduced to: Caribbean, Florida, the Hawaiian islands, and Australia.

Transportation: Released by humans, often as pest control.

The Cane Toad is among the most commonly introduced amphibians in the world. People have tried to use it to control insect population, despite the fact that there is no evidence that it has controlled any pest in Australia (where it is now considered a pest).The Cane Toad out competes native amphibians, and also secret powerful toxins that kill predators without natural immunity.