No, not custard and ice cream, but birds that come to excavate a brick
wall. I have had an e mail from a friend who is having problems with
birds that are attacking his house wall. He said they were sparrows, but
to my eyes they are black with a white chest and a flash line of white
similar to that a sparrow has on its shoulder/wing.
What they are doing is pecking at the brick work and eroding it.

Anyone got any ideas?

Dave