There are about 6,000 known species of Amphibians. Amphibians are animals that live part of their lives in water and part on
land. They breath and drink water through their skin and thus are an important indicator species for the conditions and health of an environment. There are three main groups of amphibians: 1) caecilians;
2) salamanders, newts, and mudpuppies; and 3) frogs and toads. The smallest amphibian is a frog, Paedophryne amauensis
, from Papua New Guinea and is the size of a house fly and could easily sit on a dime with
room to spare. The largest amphibian in the world is the Chinese Giant Salamander,
, reaching up to 6 feet in length and weighing up to 25 pounds.