Page 8 - Science class 4

Amphibians are generally cold-blooded Knowledge Plus

animals. They cannot bear extreme cold
weather. So, they undergo a sleeping The bird Arctic tern makes the
longest migration.
period in winter which is called hibernation .

The animal like frog, toad, tortoise, crocodile, alligator, salamander etc. live

both on land and in water.

Aerial Animals
Aerial animals are those that spend most of their time in air.

Such animals have hollow bones and wings to fly. They have boat-shaped

bodies which help them in flying.

Vulture Ostrich Bat

They spend most of the time in air in search of food.
Deciding Factor
Some of the birds fly long distances. Some birds come
to the land or trees only to lay their eggs. Some birds What do you think, is
migrate from one place to another with the change in an ostrich a terrestrial

weather. These birds are known as migratory birds . or an aerial animal?

Arboreal Animals

Land animals that live mostly on trees are called arboreal animals.

The animals like monkey, ape, koala and squirrel are arboreal animals.
Perching birds have different types of claws to hold the branches of trees.

Monkeys have long arms and tail for climbing and hanging on trees.

Koala Ape Squirrel