For years I’ve put out a bluebird box. Only rarely saw one. Now I have a guy inspecting a box every day, it seems. No female. Problem - already appears there’s a chickadee nest in it. I haven’t seen chickadees entering the box for over a week. Should I remove the chickadee nest to encourage bluebird nesting? I placed a new (identical) bluebird house 30 feet away, and he occasionally inspects it, but seems to like going into the one with the chickadee nest more. Any thoughts appreciated.