I would like to learn more about how to hunt ducks over medium to large ponds. It seems like the only duck that ever decoys in are teal and shovelers. Do Mallards or Pintails ever come into water spreads. Any advise for how to get them in? I see plenty of them fly by a mile high and ignore me but never really come down and take a good look. I have a small spread of about 12 mallards, do I need a big spread for them to come down?