To the extent I am home to observe have been watching an interesting duet between the Downy Woodpeckers and the Red-bellied woodpeckers this past week or so. They appear to both compete and also cue off one another in terms of food sources. The little Downies are not at all intimidated by the much larger Red-bellied Woodpeckers and they don't appear to quarrel over the either the suet or sunflower feeders, but they definitely appear to track one another's movements amongthe trees.