این پرنده هزاران مایل پرواز می کند، اما بال هایش صید دارند

This bird flies thousands of miles, but its wings have a catch

Scientists have uncovered an unexpected trade-off in the wings of the European nightjar, a bird that migrates thousands of kilometers but sacrifices high-speed flight efficiency to hunt insects with remarkable agility. Even more surprisingly, it generates thrust on the upward wingbeat, a technique that could inspire new flying technologies.