I'm talking about groups of birds here, they are very real. E.g, the pilot of a big plane saved the lives of the passengers when a big group(thousands) of flami

I'm talking about groups of birds here, they are very real. E.g, the pilot of a big plane saved the lives of the passengers when a big group(thousands) of flamingos take off from Doñana national park in Spain, he did what the book says not to do, put the plane in full-power and fly over them. There is a rule in engineering, never underestimate a 900km/hr projectile. And I have seen myself engines birds test that are mandatory on every turbine.