The common goldeneye (Bucephala clangula) is a medium-sized sea duck of the genus Bucephala, the goldeneyes. Its closest relative is the similar Barrow's. Bucephala is a genus of ducks found in the Northern Hemisphere. The genus name is derived The bufflehead was formerly separated in its own genus Charitonetta, while the goldeneyes proper were mistakenly placed in Clangula (as. Bright, deep-yellow eyes are the defining feature of these diving ducks. The male breeding plumage can also be quite striking. Goldeneyes breed in the northern.