In frogs and toads this larva is called a tadpole . After a few weeks or even months, the larvae transform into the adult form of a frog. Amphibians are divided into three major groups or Orders. The third group, known as Caecilians, are limbless amphibians found only in the tropics. Frogs belong to the Class Amphibia, and rely on moisture to breathe, reproduce and survive.
Most frogs are active at night.