I know they're looking for something. We have a stand of mixed woods, some of the (tall) red pine have deep-ish woodpecker holes. They're 12-20 foot off ground, though I'm unsure which insect might be the culprit. The tree itself looks only partially weakened, but I'm guessing it's only a matter of time. Any thoughts for the cause, and possible remedy - beyond felling the affected tree?