Most robotic birds flap their wings in sync. But this raven-like flier can move each of its flexible wings independently, allowing it to perform acrobatic manoeuvres during flight. The artificial bird ...

Gerdes prepares to turn Robo Raven loose during tests earlier this month. Army researchers are working on developing a small unmanned aerial system that flies like a bird—a well-trained bird, in fact.

A week or so passed before I ventured far enough downslope to see the spot where a family was started. The flat rock, protected from weather by a rock/earth overhang, had been used not too many years ...

First, I heard a commotion across the road from my house -- noisy, rattling bird sounds that I couldn't figure out. Then, a day later, I saw and heard a pair of common ravens flying low over my yard.