8. Poison Dart Frog
The name says it all. This poisonous little frog is 2 inches long, brightly colored, and has enough poison in its body to kill 20,000 mice. With only a pin-head of poison, this Dart Frog could very easily stop the heart of a large animal – like a human being.
All of the poison in the Dart Frog is located in the surface of the skin, which means that you can’t even touch this frog without risking death. It’s bright colors warns other animals to stay away.