Frogs belong to a group of animals known as amphibians. Amphibian literally means “two lives”. This is because they begin their lives in the water as eggs and tadpoles. When they grow to become adults, they live primarily on land. There are more than 4,000 different types of amphibians on earth today. Frogs are cold-blooded creatures. Because of this, they have to externally regulate their body temperature.
When they are cold, they will lay in the sun, usually on a warm surface such as a rock, to warm themselves. If they get too warm, they can be found buried in the cold mud or in the water to help cool their internal body temperature. Frogs are found throughout the entire world, expect on Antarctica. They live in all types of fresh bodies of water, because the water doesn't move very quickly.