World's Tiniest Frog is the about the size of a housefly-size. The name of the frog is Paedophryne amauensis.
In 2012 it was announced it was the world’s smallest vertebrate.
The frog is one-third of an inch long and weighs approx 0.02 gram. It is a millimeter shorter than the Southeast Asian fish, the runner-up.
Louisiana State University herpetologist Christopher Austin announced last January that he discovered the species after following chirping noises in a Papua New Guinea forest.