Plus WoodPeckers

I've had some customers ask about prevention of woodpeckers.  It is true they look for insects on a structure and treating the structure with a pesticide can work.  However, they may simply be nesting or exhibiting mating behavior.  I recommend concrete siding which makes it uncomfortable for their beak.

This Johnson County Extension Website might be helpful to you:

Check out this study from Cornell University for more of the story: