anas-platyrhynchos anatinae appearance appearances bird birds colored colorful colors coloured colourful colours dabbling-duck drake duck ducks feathered feathers male male-duck mallard waterfowl male duck cock cockerel comb farmyard fowl hens animal animals blue exotic nature park peacock peacocks zoo close-up crown face feather young nupial Phasianus colchicus pheasant plumage swim swimming water