Are a nuisance when they decide to peck on your house instead of a tree. Woodpeckers hammer on trees for two reasons: in search of food, and as a signaling device. The males repeatedly sound off to claim their territory (can't they just sing like normal birds? No, they just have to drum). Peckers often find that a wooden house serves as a good place to make their noisy territory claim, perhaps due to better acoustics. If your house has insects, then that gives woodpeckers another reason to peck away. Wild Authority has seen houses full of woodpecker holes. They can cause quite a headache with their noisy hammering, and quite a lot of damage to a home.