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by Unknown
created Feb 2014
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Last Commented: Feb 2014
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Comments (5)
They use magnetic streams, landsites and the the moon and the stars!
We humans stay and make our homes in cold and freezing places. I think birds are smarter! We also need maps and GPS!!!
There are so many things about nature that we don't understand. How the salmon knows which river to return to when he breeds? Look how he travels upstream; even climbing cascades in the water.