- Paedophryne amauensis
- 7–7.7 millimetre(s)
- Papua New Guinea ()
The world's smallest frog, and the smallest known amphibian, is Paedophryne amauensis of Papua New Guinea, which is on average between 7 mm (0.27 in) and 7.7 mm (0.3 in) in length from snout to vent when fully grown.
Researchers from USA publicised the discovery of this new species found in Papua New Guinea in January 2012. When discovered, it also stood as the smallest of the world’s 60,000 vertebrates – creatures with a backbone.
The average weight of a Paedophryne amauensis frog is 0.01 grams (0.0003 ounces).