If birds left tracks in the sky, what would they look like ... so must a pattern form in the wake of a flying bird. But of course birds in flight leave no trace—at least none visible to the ...

Radar tracking allows you to follow along to see what birds are flying overhead as the birds move to their summer feeding grounds. "The movements are massive," said Andrew Farnsworth, a migration ...

A witness says the helicopter's blades "flew off" and "it just straight up dropped", another describes seeing smoke and the ...