Watch ‘Earth Navigators’ online
Thursday, March 19th, 2009
Seasonal changes impel a wide variety of creatures, from whooper swans to monarch butterflies, to begin their epic migrations to ancient feeding, mating, and breeding grounds, sometimes covering 1000s of miles and employing ingenious methods to reach their destinations. Watch the full episode now.
Click here for more: http://www.pbs.org/wnet/nature/episodes/earth-navigators/video-full-episode/4768/
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