Peking University Unnamed Lake came a green-winged duck, mixed in a large number of Mandarin ducks and green-headed ducks, although it is not able to escape the eyes of bird lovers, photography enthusiasts have taken pictures and careful observation of it, this green-winged duck and a green-headed duck female are inseparable from each other, they are in cross-border love. Green-winged ducks are now rare in China.
