Frogs and Toads are the most numerous order of amphibians; around 88% of amphibian species are anuras. Anuras vary in size from the tiny 9.8 millimeter Golden Frog (Psyllophryne didactyla) of Brazil to the giant 7.5 pound Goliath frog (Conraua goliath) of West Africa. Reproduction and care of young also varies greatly, from laying eggs to actually giving birth to their young. In many species, the egg turns into tadpoles, but in some species, they turn directly into froglets.

Salamanders are alittle less well known as frogs are, but they too have very unique lives. Some salamanders share the same life stages as most frogs (egg, tadpole, frog), but around 80% of them lay eggs on land, and those eggs develop directly into salamanders! Salamanders vary in size from the 1.7 centimenter Arboreal Minute Salamander (Thorius arboreus) to the 150 centimenter Japanese Giant Salamander (Andrias japonicus). General morphology differs quite a bit, some have no lungs, some have permanent external gills and some only have two legs.

Caecilians are a very fossial type of amphibian, they are rarely found above ground. They are often found in moist soil close to bodies of water. Some species are even aquatic. There are around 160 species of them; found from Central America, South America, Africa and Asia. Some species lay eggs, while others give birth to live young. In many egg laying species, the females will remain with the eggs until hatching.

Most North Americans will only see Caecilians in zoos or in tropical fish stores under the name "Rubber Eels."