‘Turbocharged’ Mitochondria Power Birds’ Epic Migratory Journeys

Weighing in at a single ounce, the white-crowned sparrow can fly 2,600 miles, from Mexico to Alaska, on its annual spring migration, sometimes traveling 300 miles in a single night. Arctic terns make even longer journeys of 10,000 miles and more from the Arctic Circle to Antarctica, while great snipes fly over food-poor deserts and seas, sometimes covering 4,200 miles in four days without stopping.

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