I have mostly mallards with a few sprigs mixed in. The magnum size is nice and shows well but I mix a few standard size in the bunch. Most puddle ducks seem to feel comfortable with mallard decoys. The pond I hunted a lot in college would have the occasional flock of candians come in so I would throw a half dozen goose shell decoys on the shore off to the side a ways. I don't know if this helped ducks decoy better but they sure weren't bothered by them as long as they were off to the side a ways.SO should I get a few of each??