These are some extra fresh Pileated Woodpecker holes! That wood looks like it has been cut very recently, and it certainly looks like a professional job. Whenever you see a dead or dying tree in your yard please try to leave it there if possible – if it is not infected with something such as Hemlock Woolly Adelgid, or a particularly dangerous falling hazard to people. It will end up serving a host of species that depend on these decaying plants for food, shelter and nesting. Cutting even these trees down solely for aesthetic purposes is robbing the environment of a vital component.
Scott Kruitbosch
Conservation & Outreach Coordinator