Migration and Hibernation

Hibernation is a way that some animals ______ the harshness of winter.

Migrating animals can find their way over long and complex routes. They use ______ such as rivers and mountains to tell where they are.

Some whales swim from cold polar regions to warmer waters in winter.

When people ______, however, they often are changing homes for a long time.

Many insects and spiders are frozen solid during the ______.

Migrating animals generally go ______ between summer and winter homes.

Many mammals, birds, fishes, insects, and other animals move from one place to another at ______ of the year.

A long ______ to a new home is called a migration.

Snakes may ______ together in caves.

Other migrations are vertical, or up and down. Mule deer in the western United States travel from higher to ______ parts of the mountains in winter.

Some earthworms move from the top of the soil to ______ underground.

Animals migrate for different ______. Many migrate to breed or to find food.

Hibernating animals seem almost _______. During hibernation their heart rates and breathing slow down, and their body temperature drops.

A long journey to a new home is called a ______.

Frogs and toads rest in holes or in _____ at pond bottoms.

Most animals migrate across water, land, or air. Many birds and bats in northern parts of the world fly ______ for the winter.

Many insects and spiders are ______ solid during the winter.

Many reptiles and amphibians of mild climates become ______ in winter.

Animals prepare for winter with extra ______. They store fat to keep them alive during the months when they do not eat.

Animals ______ in a safe place and stay there until winter ends.

Some hibernating animals collect and store food before hibernating. At times during hibernation, these animals ______ to eat and then return to hibernating.

Warmer temperatures tell an animal to ______ of hibernation.