Eagle wing beat...It does work, I used to amuse my kids years ago by flapping my arms and causing flocks of birds to rise. There is, however, a serious point here; it is often difficult to persuade management that birds are a severe hazard. It is sad that often the only thing to make them see sense is a serious incident. It would be nice to see the best practice espoused at some of our major airports applied at some of the minor ones.