I haven't seen a huge flock of starlings for years.
I once went to an FA Cup match between Saarfend & AP Leamington (1970s some time - I think it was the year Saarfend drew with Liverpool - 1978). The Leamington match must have been close to being abandoned because the fog was so thick that you couldn't see from one side of the ground to the other.
An enormous flock of starlings descended at one point, presumably attracted by the floodlights. All you could hear was the noise of their wings.
I think that the crowd on that occasion was the biggest ever in the history of football - at least 500000, I'd say (plus 1500 or so human supporters).