Unwelcome visitor

The house nearest to us has always had starlings nesting in their chimney. The starlings came as usual in the early spring and set about adding to their nest. However a week or so later the crows arrived and emptied out the nest , claiming the chimney for themselves.
The crows now have 4 young, so there are 6  feasting when I am not watching and they chase away the other birds. Even worse they deposit large dollops of bird poo on the windows and our glass roof . Poor Foloh is  frequently out with his ladder trying to clean it off.
Mr and Mrs Starling have set up home across the field and still visit.
We had hail, snow, rain and sun today.