Number of species covered:
Except for a few very rare cases, mammals develop to a certain point inside mothers’ wombs before getting born into this world as young babies.
Amphibians are positioned in between Fish class and Insect class.
When young, they breathe with gills in water like fish, and when they grow up they breathe with lungs like reptiles do.
Most of them are oviparous animals that lay eggs, but there are some amphibians that are ovoviviparous.