Avian overcrowding?

At Patcham Place

It was the Rockery at Preston that was originally known as the Rookery but presumably as mature trees were lost the rooks moved out to Patcham Place and colonies were to be seen in several of the tall trees that lined the A23.  Now many of these trees have been lost but the few remaining still host  nesting rooks. The nest density seems somewhat higher than before but they are a gregarious species.