I've had for the better part of two years, a "pecker" popping holes into my masonite siding and nesting in the walls. The pattern has been skewed a bit by a squirrel that apparently likes to help/compete. I've filled the holes with wall foam that is taken right out unless covered by aluminum flashing, which has been effective for those individual spot. Most of the nests are 20-25 foot high. I cleared out one nest from the bedroom wall by removing the interior drywall. The nest was composed of sticks and leaves and was around a 1 foot square in the wall space. The bird continues to try and make holes adjacent to the flashing and seems unimpressed with flashy or shiny things hung from the roof to try and deter it. The bird itself, I've not been able to get a GREAT look at or a picture as of yet, as my approach scares it away. The rapid rhythm of it's hammering has led me to believe naturally that it was a woodpecker; but, I've yet to see an image of a woodpecker that looks like it. It appears to be about 6-8 inches in height. Appears to have an all black head (I've not caught any angles that lead me to believe it has yellow or red markings on its head). It has a long clearly yellow bill. It's breast or wings may be a bit speckled of black/white.. but, in general, it appears to be a mostly dark bird. It actually looks more like a starling without the iridescence to me... but again, I've only seen it from a distance or in immediate flight.