Flickers are the only woodpeckers that frequently feed on the ground, according to the Audobon guide. Their primary diet is insects although they do eat fruits, berries, seeds and nuts. They will go after ants that live underground.
Our ten acre partially wooded rural property.
The tree shown in this photograph is a dead Russian Olive. In it's prime it was used by a variety of birds, woodchucks, raccoon and squirrels. It continued to be of use to wildlife after it's death so we left it standing.