lots a flapping about is a bit of a give away that its Woodpigeon - hard to see in a still photo.

I like this one Colin............I've never seen that many wood pigeon in one go!

(My first thought on seeing the thumbnail was that your sensor needed cleaning)! :-))

well the sensor does need cleaning BUT like the man who bought a new car when the ashtray was full I think I might just buy a new camera instead. ( just joking!)