Source: Nature: "Earth Navigators"
Major corporate support for the Nature collection was provided by Canon U.S.A. and SC Johnson. Additional support was provided by the Corporation for Public Broadcasting and the nation’s public television stations.
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Few sights are as majestic as monarch butterflies roosting in trees or flocks of whooper swans migrating across northern skies. Seasonal changes propel a wide variety of creatures to begin migrations - sometimes on an epic scale - to feeding, mating and breeding grounds. This video segment from Nature introduces the story of the seasonal migrations of four different species from across the planet: the wildebeests of East Africa, monarch butterflies of Mexico, sockeye salmon of North America, and whooper swans of Europe.
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Seasonal changes impel a wide variety of creatures to begin migrations - sometimes on an epic scale - to feeding, mating, and breeding grounds. These journeys sometimes cover thousands of miles and require ingenious methods to accomplish.
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