Frogs are amphibians in the order Anura. Most frogs are characterised by a short body, webbed digits, protruding eyes and the absence of a tail. Frogs are exceptional jumpers.

Due to their permeable skin, frogs are often semi-aquatic, but move easily on land. They typically lay their eggs in the water, and their larvae (tadpoles), have gills and develop in water. Adult frogs are carnivorous, they eat mostly arthropods, annelids and gastropods. Their call is very characteristic, and can be widely heard during the night or day, mainly in their mating season.

The distribution of frogs ranges from tropic to subarctic regions, but most species are found in tropical rainforests. They are among the most diverse groups of vertebrates. However, populations of certain frog species are declining significantly.