Glands in the skin of poison-dart frogs protect from predators via a secreted neurotoxin called batrachotoxin.

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"Yet another type of skin gland is the poison gland which is prevalent among amphibians, including the common toad…The most lethal frogs are a few Phyllobates species: named batrachotoxin, their poison is 250 times stronger than strychnine, and acts on the nervous system." (Foy and Oxford Scientific Films 1982:80)

The grand design: Form and colour in animalsJuly 2, 1983
Sally Foy

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Alagoas Rocket FrogPhyllobatesSpecies

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