Flightless species of birds (such as ostriches, which are the largest living birds) tend to outsize any of the largest birds ...

That's the way one scientist puts it — referring to how infected wild birds survive long enough to spread it to birds and ...

There have been dozens of yeti sightings in Colorado. There is no evidence of the yeti's existence, but actual researchers in ...

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 ...