Funny story about a Woodpecker. Back in the early 70's when the Exorcist first hit the movies a neighbor came knocking on my door, pale as a ghost, wanting me to come to her hose because weird things were going on and she was afraid to go back home. She said there was a weird noise all through her house. I went next door and went in to investigate and sure enough there was a noise that resonated throughout her house. i looked in every room and couldn't find anything. Finally I went out side to investigate. Up on her roof was a huge Red headed Woodpecker pecking on the metal furnace vent pipe. The noise in the house was 10 times louder than what we heard outside.She said she had just seen the Exorcist the night before and she hadn't gotten over it yet.