The Blue-winged Goose (Cyanochen cyanopterus) is a large sheldgoose, which is native to Ethiopia. It is the only member of the genus Cyanochen.
This little-known species breeds by mountain lakes and streams. Its lined nest is built amongst grass tussocks, and average clutch size is 6-7 eggs. It can swim and fly well, but this terrestrial bird is reluctant to do either, and is quite approachable. It forms flocks outside the breeding season.
This stocky grey-brown bird measures 60-75 cm and has a slightly paler head and upper neck. It has a small black bill and black legs. In flight, this species shows a pale blue forewing. Sexes are similar, but juveniles are duller in color.
The Blue-winged Goose is usually a quiet species, but both sexes may give a soft whistle. It feeds by grazing, and is apparently largely nocturnal, loafing during the day.