In captivity, poison dart frogs are not poisonous. It is in the wild where they are poisonous because of what they eat. This amphibian of the Dendrobatidae family is considered the most poisonous vertebrate in the world. The optimal habitat of "P. terribilis" is the rainforest with high rain rates (5 m. or more), altitude between 100-200 m, temperature of 26 °C, and relative humidity of 80-90%.