Poisonous Frogs

 

Many frogs are able to absorb water and oxygen directly through the skin. Some frogs have the ability to change colour, but this is usually restricted to shades of one or two colours. Most poison dart frogs have brightly colored skin which is used as a warning sign to predators. These frogs can be very small, ranging from one to six cm in length, depending on the age, sex, and species of the frog.
 
22 more images of some of  the deadliest frogs in the world after the jump.