World's Tiniest Frog
This housefly-size frog, Paedophryne amauensis, has snatched the record as the world’s smallest vertebrate. One-third of an inch long and weighing 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.
Courtesy Christopher Austin / Louisiana State University