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Migratory Songbirds Trade Off Safety for Lower Energy Expenditure, New Study Shows



Each spring and fall, millions of birds switch to migrating at night. Most of these are small songbirds migrating long distances that need to alternate their migratory flights with refueling stopovers, which can account for up to 80% of the total migratory period. After a long nocturnal flight, these birds face the contrasting needs to […]



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