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Some species of frog secrete toxins from their skin. These toxins deter predatory animals from eating them, and some are extremely poisonous to humans. Generally the frog obtains the poision from the insects or animals they eat. The Australian corroboree frogs pseudophryne corroboree and pseudophryne pengilleyi have very recently been discovered to be able to manufacture a unique alkaloid which is not derived from their diet (Daly). Some natives of the Amazon area extract poison from the poison dart frog and put it on their arrowheads when hunting. |
