Amphibians are a class of vertebrate animals that include frogs, toads, salamanders, and caecilians. They are cold-blooded animals that live both on land and in water. Amphibians are important to the environment because they help to control insect populations, and they are an important food source for many other animals.

Amphibians have a unique life cycle that involves both a larval stage and an adult stage. In the larval