a king eider

a Steller's eider

a surname / any of various places, particularly in Kyoto

(rare) alternative spelling of 家鴨: a domestic duck, Anas platyrhynchos var. domesticus, descended from the mallard

a duck / (slang) (from the way ducks return to the same place and are thus easy to hunt) a mark or easy target for a swindle, someone who is likely to lose at gambling or other competition

“to make a duck of someone”: to skillfully or cunningly beat out an opponent, such as in gambling or a swindle; compare English to make a monkey out of, to shark someone

wild duck / mallard

a northern pintail

wild duck

smallness; small size, small (sometimes used as an abbreviation for small serving, etc.) / Short for 小の月 (shō no tsuki).