[wwbirds]

It was available free from DU and not only showed all north american ducks but the zone they generally fly in.
Buffies merganzers etc usually fly low over water and are not great for table fare while mallards pintails etc fly high and drop down directly to water are better tasting.
Puddle ducks jump straight up off water and are good for table while divers usually run and flap along the surface to get airborne are not good for table fare.

I know, I know I have many people tell me they eat merganzers, eiders and even buffies but with mallards pintails gadwalls etc available in large quantity in Alberta why would you want to??