Common Goldeneye

Its Japanese name comes from the white markings on its cheeks.

Scientific name	Bucephala clangula
English name	Common Goldeneye
Japanese name	頬白鴨
Classification	Aves
Classification details	Anseriformes Anatidae
Full length	about 46cm.
Distribution	Middle latitudes and above in Eurasia and North America. In Japan, it is mainly found in northern Japan.

Characteristics

A winter bird characterized by white spots on the cheeks of males. The male has a glossy deep green head and yellow iris. The back is black, the belly is white, and the beak is black. The female has a dark brown head and gray body, not as distinct as the male. The female also has a yellow beak tip. Juveniles closely resemble females, but do not have yellow beak tips.

Ecology

Breeds from spring to summer. It comes to Japan as a winter bird. Found in lakes, rivers and bays. It dives and preys on small underwater animals. They often move in groups.

Habitat

Lake Suwa Kamaguchi Water Gate

About 10 birds were swimming in a flock in the pool in front of the water gate. There were two males followed by females and juveniles. There was a female soaking wet just below the lock, foraging furiously. This individual was the only one who was separated from the herd.