There's a fella employed by the NHS who goes around in a van with this hawk (think it's a Harris Hawk) and then walks around the hospitals with this thing off his glove and in the air. Apparently it's one of the best and most natural ways of keeping the pigeons and their dirt away from the hospitals. It doesnt need to attack them, just to fly around! I was at Wythenshawe when my mum was bad last year, and watching this bloke walk around with this hawk doing its thing was pretty special, a nice distraction from a sorry time.