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 ...

People were reporting like birds falling from the sky. 'It seems far-fetched, but because they become so neurologically disabled, they don't know their whereabouts. They're flying into trees.

"It was like birds falling out of the sky, dead," she says ... The virus evolved so some wild birds are able to migrate just far enough to reach another bird community or mammal population ...

"It was like birds falling out of the sky, dead," she says. Uhart is a veterinarian and director ... The virus evolved so ...