I had a similar thing happen earlier this spring. It seems the louder the male woodpecker pecks on things, the better he is at attracting a mate. Anyway, this woodpecker learned that pecking on the metal furnace flue coming out of my roof made the most noise. I was woken up on Saturday morning (after a long night of rock star partying) to this very strange metallic pinging sound. It sounded like it was coming from the basement, but I couldn't find the source. I finally went outside and saw the woodpecker pecking on the furnace flue. I was able to chase him away and go back to bed. Just to have him come back a half hour later. This went on for a couple of hours, until I finally chased him over to the neighbors house and their furnace flue. Man what a racket! :lol: