(1):

(n.) The ruddy duck. See under Ruddy.

(2):

(n.) The shoveler. See Shoveler, 2.

(3):

(n.) Any one of several species of wading birds of the genera Ajaja and Platalea, and allied genera, in which the long bill is broadly expanded and flattened at the tip.

(4):

(n.) The paddlefish.