The golden poison frog

This is one of those poisonous dart frogs which store poison in their skin glands. Luckily, they are immune to the poison which is helpful considering their sociable nature. However, don't let that lull you into a false state of security, the poison is so toxic that one frog's poison could kill tens of thousands of mice. Sometimes this poison is used to make the arrows of indigenous people more effective when hunting their prey.