Birds have different kinds of feet and beaks. Some birds eat small animals. Others eat seeds. Mother birds lay eggs in a nest. Then, she keeps them warm until the baby birds hatch from the eggs.
Birds are warm-blooded animals.
Birds breathe in air through their lungs. Fish Fish live in water all the time. A fish uses its tail and fins to swim. They have scales covering their bodies to help protect them. All fish have gills, which they use to breathe.