Pictures of dart frogs.
These frogs are found in South America and, like all dart frogs, they are poisonous when in the wild. In captivity, when fed only non-poisonous insects, they're harmless. Dart frogs are used by the natives of South America to poison darts used in hunting using the mucus secreted from the frog's skin. Do not eat these.
Pictures of poison dart frogs, Dendrobates tinctorius. These frogs are found in South America and, like all dart frogs, they are poisonous in the wild. They get their poison by eating poisonous insects, so in captivity, they are harmless. Dart frogs get their name because the natives of South America use them to cover the tips of their hunting darts.
The poison is secreted as mucus on their skin. There are little to no predators that eat these frogs more than once; they learn their lesson after the first.