|Cane toad (Rhinella marina)|
|History of cane toad range in Australia|
Cane toads eat practically anything they can get their mouth around and excrete a toxin from the gland behind their eyes (parotoid gland) that causes illness or even death in those that touch it. Because of this, these toads pose a serious danger to all native wildlife as well as humans and domestic animals. Human deaths are known to happen after ingesting the toads or their eggs. There is still research being done into the best way to reduce the population numbers, with hopes for a successful biological control.
Cane toads are listed on the 100 World's Worst Invasives as #16.
Images are from Wikimedia Commons under Creative Commons licenses: one, two