Repairing a gap under a eave.
They chew, rather determinedly. Keeping them out when they want in is no small task, indeed. One approach with moderate success is to cover the opening with hardware cloth (heavy wire mesh) molded to fit and nailed carefully in place, and then spray foam. Board over the top if you like for appearances sake. The missing wood may well have been chewed away rather than knocked loose, given their usual mode of operation. Keep an eye out for new holes being chewed elsewhere on the house.