Classifying Animals. Animals can be classified into six groups. Mammals. What are Mammals?. They breathe through their lungs Mammals are warm-blooded animals All mammals are covered with hair Most mammals give birth to their young alive Female mammals produce milk to feed their young.
Dolphy, why are we mammals? We look much more like fish.
It’s because our mothers produce milk to feed us! Other types of animals do not do that.
Do you think a bat is a mammal too?