Anas Americana is commonly known as the American black duck and belongs to the family Anatidae. The American black duck is a medium-sized bird that is predominantly black in color with a purple-blue iridescence and muted brown feathers blended in. Synonyms for the American black duck include Anas speculosa, Anas rubripes, Anas caribou, Anas obscura, and Anas brevirostris. The American black duck can be easily mistaken for the mallard duck, but the former has a darker plumage and a distinct green sheen on its head. These ducks are known to be strong swimmers and can be found in wetlands, ponds, and streams across North America.