American Black Duck (Anas rubripes) [XC628458]
by William Whitehead from Sandy Hook, Monmouth Co., NJ, United States (call, hee whistle)
American Black Duck (Anas rubripes) [XC203263]
by Andrew Spencer from Nelson Beach, Plymouth, Plymouth Co., Massachusetts, United States (call)
Subspecies
Forms a superspecies with Mallard (Anas platyrhynchos), Meller's Duck (Anas melleri) and Yellow-billed Duck (Anas undulata). Sometimes considered a subspecies of Mallard (Anas platyrhynchos), with which frequently interbreeds.