Common goldeneye

Common goldeneye
	Adult male
	Adult female
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Anseriformes
Family:	Anatidae
Genus:	Bucephala
Species:	B. clangula
Binomial name
	Bucephala clangula; (Linnaeus, 1758)
Subspecies
	B. c. clangula (Linnaeus, 1758); (Eurasian goldeneye) B. c. americana (Bonaparte, 1838); (American goldeneye)
Synonyms
	Anas bucephala Linnaeus, 1758; Anas glaucion Linnaeus, 1758; Clangula clangula (Linnaeus, 1758);

The common goldeneye or simply goldeneye (Bucephala clangula) is a medium-sized sea duck of the genus Bucephala, the goldeneyes. Its closest relative is the similar Barrow's goldeneye. The genus name is derived from the Ancient Greek boukephalos ("bullheaded", from bous, "bull " and kephale, "head"), a reference to the bulbous head shape of the bufflehead. The species name is derived from the Latin clangere ("to resound").

Common goldeneyes are aggressive and territorial ducks, and have elaborate courtship displays.

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