First Children Encyclopedia

(Marvins-Underground-K-12) #1

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
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