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Are some great animial migrations in peril? listen

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Tags: migration, climate change, animals, global warming

What drives billions of animals to make epic migrations every year and how are migrations being affected by habitat destruction and climate change?

To address these important ecological questions, WMNF spoke with Karen Kostyal, author of the National Geographic book Great Migrations. It's is a companion to the National Geographic Television series of the same name.

"Well, I think there are two really compelling reasons animals migrate. We've called them the 'need to feed' and the 'n...