Normally if you are dressed in full camo, have a license with a duck stamp, HIP and Fed Duck stamp, have a duck call hanging around your neck and only have non-toxic shot with you hunting in an area adjacent to a brook, river or pond where ducks are located, that would lead a reasonable person to believe that you are duck hunting. I don't know too many pheasant hunters....non actually....who use steel or bismouth on pheasants.

However if the area is specified in the hunting guide as pheasant hunting only, then the only species you can legally hunt there are pheasants.