They have streamlined, feathered bodies and wings. Their legs and feet are scaly and they have beaks for feeding, but no teeth. Birds are warm-blooded and their young hatch out from eggs. Amphibians are born in water and live the early part of their life there. Later they move to land.
Fishes are cold-blooded and live in water.
They start life as eggs. They have scaly skins, and fins help them to swim. They breathe oxygen from the water through gills. Invertebrates Insects are the largest of the invertebrate groupings. There are more beetles than any other insects.