Waterbirds: Swimmers
Ducks
Ducks are typically placed in 3 groups:
Tree/perching - Whistling, Muscovy, Wood
Dabbling - a large group of ducks (e.g.: Mallard)
Diving - sea ducks (e.g.: Scoter); bay (e.g.: Canvasback), sawbills (e.g.: Merganser); stiff-tailed (e.g.: Ruddy)