I have always known that there are certain types of toads and frogs out there with very strong and venomous poisons that can either kill you or cause psychoactive effects but to kill more then half a population of crocodiles is crazy. Professor Keith Christian from Charles Darwin University has recently conducted a survey on the Victorian river that showed that in a one year period over 70 percent of the crocodiles have died due to eating Cane Toads. Who ever thought something so small could kill something so big. You can find a picture of the frog below.