My friend has an Avian bird control company over here. Does loads of townies, sometimes with an air rifle. He does lots of sensitive areas with the Harris Hawks. Does a fair bit of barrier control, nets, spikes, wires and ting. Does loads of other bird stuff too, but still needs to put a bit of rat poison from time to time to pay the bills. Saying that, he has done very well for himself. Has now started to breed a "few" racing Falcons for the Arabs £$£$£$£