How many Stages in a Frog's Life Cycle? 4 Stages 1st Stage: Egg A frog begins its life starting off as an egg 2nd Stage: Tadpole The tadpole lives in water. Like a fish, it breathes with gills. It has no legs, and it has a tail that it moves to swim. 3rd Stage: Froglet It grows lungs and begins to breathe air instead of water. It grows two back legs and two front legs, and it climbs in and out of the water. 4th Stage: Frog The frog crawls or hops around on land and swims in water. It has lungs and breathes air. It has four legs and no tail.