What is "black scoter"

The black scoter or American scoter (Melanitta americana) is a large sea duck, in length. The genus name is derived from Ancient Greek melas "black" and netta "duck". The species name is from the Latin for "American ". Together with the common scoter M. nigra, it forms the subgenus Oidemia; the two are sometimes considered conspecific, the black scoter then being referred to as M. nigra americana. Its French name, used in parts of its Canadian range, is macreuse noire (also meaning "black scoter"). The species is listed as Near Threatened by the IUCN.