Why do woodpeckers hammer on homes?
Because they can.
Seriously, here's why woodpeckers and other cavity nesters peck on your home.
Woodpeckers can frustrate us, but these protected birds indicate a healthy forest and mitigate insect damage in our trees.
Northern Flickers are a keystone species and provide cavities for all sorts of other animals, including owls, ducks, chickadees, and other animals like weasels.