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A Study On Just How Long Birds Can Fly Revealed That One Species Known As The Common Swift Can Soar The Skies For Ten Whole Months Without Taking A Break

Hedenström and his team are trying to figure out how and when the birds sleep. One idea is that common swifts sleep while gliding like the great frigatebirds.

Common swifts rise to an altitude of 10,000 or more feet every day at dawn and dusk, gradually gliding downward. During a declining flight, the birds may take brief sleep periods.

In contrast, great frigatebirds nap while ascending. Unfortunately, the neuro-logger used to track the frigatebirds’ sleeping patterns is too heavy for the common swift. So, the scientists will have to wait to verify their speculations.

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