That’s a good question. Let me try and answer that for you. Woodpeckers only peck on wood in search of food. Woodpeckers have impeccable hearing….. no pun intended!!! So like I said, they have great hearing and can hear little bugs moving around in the wood. When “bore bees” or carpenter bees dig holes in the wood on your home, they are females looking for a safe area to lay their eggs which turn into larva, which woodpeckers love and will destroy any wood on your home to get to. Once the woodpeckers have created holes in the wood, it’s only a matter of time before small critters take residence inside the holes to get out of the weather.