The frogs belong to the Atelopus group from Central and South America.

Some harlequin frogs have lost their poison—and their ability to defend themselves. Scientists are on the case.

All you ever needed to know about poison dart frogs, from why they're poisonous to where they live and what they eat ...

Certain species of wasps and frogs share a pain and inflammation peptide similar to one found in vertebrates to help defend against predators—a discovery that contributes to a shifting view of how ...