You have a log cabin, you like the rustic look, clean and fresh. You notice pin holes appearing on the wood surface and a powdery sawdust trickling down the rough surface of the wood on to your Flying Canvasback Wall Mount. You have powder Post beetle and they are second to termites. They damage the wood from the inside out. They infested the tree when it was still… More on this story here.
https://www.eurodita.com/powder-post-beetle-control-for-log-cabins/