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Migration Forest
Over thousands of years,
Earth’s climate has changed,
Forest plants and animals have and different types of forest
have grown in new places. For
found many ways to survive. example, the climate has
Some animals take long become warmer, so trees that
prefer cold places have been
journeys, called migrations, found growing farther north.
moving from place to place.
They move in search of water,
food, and warmth, and return Woodland caribou
to the best places to give birth Woodland caribou are found
in North America, Russia,
to their young. Many of these and Northern Europe. Every
animal migrations happen over summer they travel more than
600 miles (966 km) to different
a year. The forests themselves forests to feed on new grasses.
can also migrate, although this
takes many thousands of years.
Umbrella bird
These tropical rain forest
birds, found in South
America, migrate into the
Help to migrate high mountains to mate.
They then return to the
Some forests need help to survive because of lower areas of the rain forest
changing habitats and humans cutting down to lay their eggs.
trees. People can help by collecting and
replanting saplings in other places where
they can grow well.
Monarch butterfly
Planting saplings
Monarch butterflies living in
the eastern states of the US
migrate more than 2,500 miles
(4,000 km) south to Mexico.
Here, they eat and stay warm
over winter, then return north
to lay their eggs.
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