Winter in some places is very cold.Snow covers the ground and ponds freeze.Many animals can't find the food they need to survive,so they migrate 'migrans' in Latin, to move from one place to another.They go to warmer places where food is still accessible and stay there until spring,then migrate back home.Diverse animals migrate in diverse ways.
So here's some facts about the nature things when winter comes...
By Air - To find warmer places,some birds fly more than 3,000 miles in spring,they fly home,build nests and lay eggs.The following autumn,the baby birds will migrate too.
Some butterflies fly south over 1,000 miles for the winter.As they fly back home in spring,they stop along the way to lay eggs.The new butterflies that hatch continue to trip north.
To get where flowers are still blooming,some bats migrate more than 1,000 miles across the dessert.The bats feed on the nectar from the flowers or fruit from trees.
By Water - Pods of whales live off the coast of Massachusetts,a place that has cold and snowy winters.So the whales swim 3,500 miles south,to warmer water off the Island of Bermuda.There they have their young,and in spring,they all swim back home.
Elephant Seals migrate about 21,000 miles roundtrip every year.They travel back and forth between California and Alaska,following weather and the food.
By Land - Herds of bighorn sheep in Canada and United States migrates shorter distances up and down mountains in summer,there's plenty of grass on mountaintops but in winter,the ground's covered with snow.So the sheep climb down the mountain where there are still shrubs and other small plants to eat,and in spring migrate back to peak.
Caribou that live in the Arctic migrate when the snow gets really deep.They more hundreds of miles to a place where there's less snow.Then they can sniff out uncover and eat the tender plants that still grow under snow.
"Animals have their natural knowledge on how to survive their lives according to season they're into.And to make a healthy community of their own."
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