If birds had an Olympic event for endurance, the common swift (Apus apus) would take gold—without landing to collect it. This small, sleek bird can stay airborne for nearly a year without touching the ground.

With scythe-shaped wings and a body built for gliding, swifts eat, drink, mate, and even sleep on the wing. Scientists have tracked individuals flying nonstop for 10 months, crossing continents between Europe and Africa.

How do they sleep mid-air? Swifts use unihemispheric slow-wave sleep—one half of the brain rests while the other keeps them flying. It's the ultimate power nap.

Why don’t they land? Their tiny legs are suited for clinging, not walking. Outside of brief nesting periods, swifts spend their lives in the sky.

By age four, a swift may have flown over a million miles—about two round trips to the Moon. If you see one streaking through the evening sky, you’re witnessing nature’s true jet-setter in action.