Early last spring, a Northern Flicker went to work on a house down the street from me. Owners are snowbirds - imagine the shock of coming home and seeing basically all of the wood trim work on your house drilled up and ruined.
Took most of the summer to repair, mostly by replacing with non-wood materials like stone. However, for some strange reason one trim board above the front door was not repaired/replaced.
Sure enough, last week, as I was walking by in the morning, I hear the rat-a-tat-tat of the Northern Flicker, hard at work one year later. Now drilling holes in between the ones he/she drilled last year (infill drilling?).