There's a sparrow on top of my roof that has been screeching non-stop from first thing in the morning until the birds' bed-time. That's about 14 hours, and has been going on every single day for the last couple of weeks. It's driving me insane - even when the doors and windows are closed I can hear it. How can such a little thing make such a racket? How long will I have to put up with this?