Amphibians reproduce by laying eggs, but the fertilization process differs based on the type of amphibian. Amphibians include frogs and salamanders and they spend their lives living both on land and in the water.
Unlike mammals that give birth to live babies, amphibians must lay their eggs in a suitable environment in order to reproduce. Popular habitats for egg laying include streams, plant stems, under leaves or plant life or in specially-built mud homes.
The salamander fertilization process can be external or internal. In most cases, the males excrete sperm that the female picks up and stores in her glands. She uses the stored sperm to fertilize the eggs she lays. Most frogs fertilize externally, with the male holding onto the female's back legs and emitting sperm when she begins to lay the eggs.