Birds clear out of breeding ground as severe weather approaches

December 19, 2014 9:39 PM

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Birds clear out of breeding ground as severe weather approaches

After a 5,000 mile migration, an impromptu 1,500 mile reversal.

Birds perform incredible feats of migration, crossing entire continents on their journeys between favorable nesting and feeding grounds. For most species, this behavior appears to be hard-wired in, driven by instinctual urges. But a recent study suggests that at least some birds aren't purely creatu...

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