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 ...

"We've gone from this concept of dead birds don't fly to this new virus that seems to be a bit more like dead bird flying," explains Erik Karlsson, head of the Virology Unit at the Institut ...