Controlling, deterring, moving starling flocks ain't easy; I know cos I've tried.
But, moving their sleeping quarters is possible with some percy verence.
Cutting down the attractive bushes around the terminal is usually not an option, so denying them time to rest is an alternative. It takes a number of dedicated staff to make a noise night after night until the flock decides to up camp and look elsewhere. But it works if taken to its logical conclusion.
Sir Geor Cayley