A street is being drenched in bird droppings after it was invaded by a flock of more than TWENTY THOUSAND starlings. Like a scene from Alfred Hitchcock's thriller The Birds, the huge swarm turns the sky black each dawn and dusk as they prepare to feed or roost for the night. But they also cover a small cul-de-sac, in Hereford, in a 'snow storm' of droppings, showering houses and cars in a blanket of excrement. Residents have to cower under umbrellas if they venture outdoors and some motorists have had to start cleaning their cars and windows daily.