Whether they’re opening for takeoff, spreading wide for a lazy soar or flapping to brake for landing, bird wings make flying ...

Although it’s not uncommon for birds to communicate with each other by flapping their wings to make a desired noise ... song and then they are quiet for a moment and they do this little flight that we ...

An curved arrow pointing right. A drone that uses retractable feather wings, mimicking the natural flight of birds, has been designed by researchers in Switzerland. More from Tech A drone that ...