Many species of frog are known to be poisonous, such as the often colourful poison dart ... 25 times more potent than that of Fer-de-lance pit vipers from Central and South America (genus Bothrops).

The first thing that stands out about the Surinam horned frog is its size. These rotund amphibians can grow to 8 inches in length and would cover a good-size tea saucer. They are found in ...

Horned frogs are found in South America. They don't actually have horns, but they do have very wide mouths. Poison dart frogs are dangerous. They live in South America, too. And their bright ...