Migrating Birds Reset “Compasses” at Sunset, Study Says

Publication: National Geographic News   Date: April 15, 2004   View Article

Sunset is more than a thing of beauty for Swainson’s thrushes and gray-cheeked thrushes. It keeps them on course when migrating between their winter and summer homes, according to an international team of scientists.

The finding sheds further light on a question that has vexed scientists for years: How do birds navigate between nesting areas separated by thousands of miles with pinpoint accuracy?

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