Which is the fastest fluing bird?

The fastest flying bird currently living is the peregrine falcon. At steady, level flight it can hit up to 60 mph. A peregrine falcon's average dive speed is around 100 mph, such as when it is hunting for food. And if it was in danger, it can dive at speeds of up to 240 mph. But then, of course, it has to stop and that can be tricky at those speeds. But I suppose if its life was in danger, it might risk it.