Insects
They have four legs, skin with hair or a fur, warm blood and they have milk for their babies.
Fish
Mammals
Reptiles
They have fins, scales, cold blood and they lay eggs.
They have two legs, feathers, a beak, warm blood and they lay eggs.
Any cold-blooded animal that has gills to breathe in the water and later develops lungs for breathing on land.
Amphibians
They have legs (except snakes), skin or scales, cold blood and they lay eggs.
They are small, air-breathing anthropods having a body divided into three parts and having two antennas, three pairs of legs and usually two pairs of wings.
Birds
