First Children Encyclopedia

126

There are so many different types,

or species, of animals that

scientists put them in groups

so it’s easier to study them.

Mammals, birds, reptiles,

amphibians, and fish are

vertebrates. Creepy-crawlies

are invertebrates.

Types of animals

What is the only mammal that can fly?

Reptiles

Most reptiles have dry,

scaly skin. They mainly

live on land. Nearly all

reptiles lay eggs, but some

give birth to babies.

Mammals

Mammals usually have live

babies, which feed on their

mother’s milk when they’re

born. Mammals often have

fur on their bodies. Humans

are mammals.

Zebra

Wolf

Mouse

Lion cub

Lizard

Deer fawn

The living world

Tortoise