How to keep birds off of chimney cap?
So I confirmed this morning at 6 am that the jarringly loud vibrating sound coming from our gas fireplace is in fact a little winged creature who is apparently showing off to his buddies how much noise he can make. We have a "fake" chimney built up around the vent pipe for the fireplace, and there is a metal cap that covers the whole thing. The bird appears to be trying to drive a hole through this cap with his beak. I got rid of him this morning with a poorly aimed rock, but does anyone have any suggestions on how to keep varmints away permanently?