I was getting dinner ready today and I heard this horrible grinding metal sound. It lasted about 10 seconds, and then again about 20 seconds later it happened again. It kept going at a regular pace, so I went to the back door to see if I could hear it. It seemed like it was getting further away so I went back to the kitchen, and there it was again! So, I opened the window and it was really loud. Then I went up to the front door and checked. It was fainter, so now I am wondering what is coming and going outside, and go back to dinner. Half a minute later and it's as loud as it ever was, so I walk back to the front door past the fireplace, and rattle rattle ratatatatat! So, one more time out the front door, and looking at the roof this time. There's a Flicker (woodpecker) on top of my chimney tapping on the metal flashing. I like birds, and I've heard that they will do this in the spring until they find a mate. I'm waiting to see if they really do it at 5:30 in the morning. I hope he finds a girl soon!