Most Poisonous Frogs On The Planet

Many frogs contain mild toxins that make them unpalatable to potential predators. Some of them, such as poison dart frogs, are especially toxic. The chemical makeup of toxins in frogs varies from irritants to hallucinogens, convulsants, nerve poisons, and vasoconstrictors. Many predators of frogs have adapted to tolerate high levels of these poisons. Others, including humans, may be severely affected.