How Can We Group Animals?

A mammal is an animal that has hair or fur.

Almost all mammals give birth to live young Almost all mammals give birth to live young. The young drink milk from their mother’s bodies.

A bird is the only kind of animal that has feathers A bird is the only kind of animal that has feathers. Most birds use their wings to fly.

Birds have their young by laying eggs.

A reptile has scaly, dry skin.

Most amphibians have smooth, wet skin.

Most fish are covered with scales. Fish live in the water Most fish are covered with scales. Fish live in the water. They use gills to breathe.

An insect is an animal that has three body parts and six legs.