Amphibians are DIVERSE!
There are about 6,000 known species of amphibians. All amphibians are classified into one of three main groups: Frogs, Salamanders and Caecilians. The smallest amphibian is the Izecksohn's toad (Brachycephalus didactylus) from Brazil which is only 1 cm. in length. The largest amphibian is the Japanese giant salamander (Andrias japonicus) which is six feet long and weighs up to 140 lbs!