Plump songbirds more likely to survive migration over Gulf of Mexico

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A kilometer above Fort Morgan, Alabama, small migratory birds face a critical decision. Ahead lies a thousand kilometers of open water, the Gulf of Mexico, and a 22- to 24-hour flight without rest or food. On the other side, if they make it, they'll continue the journey to their South American winter habitat. For some, the journey will end in the waters of the Gulf.

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