Australia celebrated Toad Day Out this past weekend, resulting in the deaths of thousands of toxic cane toads.
Cane toads were introduced to north Queensland canefields from South America in 1935 to eat pest beetles. The slimy interlopers couldn't jump high enough to reach the beetles at the top of the cane stalks and, instead, rapidly spread in search of food. Millions of them now threaten many local species and spread diseases such as salmonella across northern Australia.
Ick. The hallucinogenic amphibians were profiled in the documentary Cane Toads: An Unnatural History. Ribbit in peace.