Im putting the cart before the horse, but thought I would ask anyway. We are looking at some land, with a fairly large pond. It has 2 wood duck boxes at one end, empty of course. If I got a pair of wood ducks, could I also get something like call ducks or something? Or do I need to keep with just wood ducks. Im afraid if I just got a pair of wood ducks, they will stay way down on that end of the pond in the marshy area and I wont ever see them swim around.