This piece was one of the first where insect damage to the wood, which I call critter holes, was taken advantage of to enhance the natural character of the wood. In working with this kind of critter-holed wood, often I will find the live critters still doing their thing. As near as I can tell, there a number of different critters who reside in mesquite wood, and offer their unique leftover tunnels. This happens mostly in the outer growth wood, but often moves into the inner heartwood.