By most accounts, the North Dakota opener was a successful one for hunters. A mixed bag of birds--widgeon, gadwall, some divers and a few remaining teal--were taken over water, while residents in the know filled their straps with mallards hunting exclusively in the fields. The prairie pothole region of eastern North Dakota is a prime production area for ducks, and locals often spend the few weeks before season patterning large flocks of ducks moving from roost to feed. It's a well-worn tradition up there to hunt these fields, letting the birds have the water to roost on. Doing so ensures the birds stay in the region longer, especially in the early season before bad weather forces them south.