Survivor: the flightless takahē was once thought extinct, before being ‘rediscovered’ in a remote valley in New Zealand.
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Evolution towards flightlessness has been much more common through history than scientists once thought.
Geese fly day or night, depending on when conditions are best.
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Geese honk loudly and point their bills toward the sky when they're ready to start the migration. Here's how they know it's time, how they navigate and how they conserve energy on the grueling trip.
Reconstruction.
Yuan Zhang
Did feathers evolve in the common ancestor of pterosaurs and dinosaurs? Not everyone is convinced
Reverse-engineering birdflight helped researchers create a powerful new kind of drone.
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Inspired by the aerobatic manoeuvres of the swift, a new "flapping wing" aircraft can hover, glide and dive much better than quadcopter-style drones.
Oleksandr Umanskyi / shutterstock
One bird we tagged flew for 172km without a single flap.