Loading...

Loading...

Animals

Animals

Scientists have grouped animals into classes to make it easier to study them. There are many different animal classes and every animal in the world belongs to one of them. The five classes of vertebrates (animals with backbones) are mammals, birds, fish, reptiles, amphibians.

Animals

Mammals

A mammal is an animal that breathes air, has a backbone, and grows hair at some point during its life. In addition, all female mammals have glands that can produce milk. Mammals are among the most intelligent of all living creatures. Mammals include a wide variety of animals, from cats to humans to whales.

fun fact

The biggest animal on earth is a mammal - the 30m long BLUE WHALE.

Mammals

Birds

Birds are a class of vertebrates, the Aves. They are warm-blooded and lay eggs. Their bodies are covered with feathers and they have wings. Feathers have three functions: flight, temperature regulation and display. Most birds have hollow main bones with air sacs in them. This makes them lighter and makes flight easier.