Falcated Duck/Teal Mareca (prev. Anas) falcata

Falcated Drake
Falcated Duck
The Falcated Duck is also called Falcated Teal because of the teal-like appearance of the drake but it is apparently more related to the Gadwall than to the Teal. It is native to East Asia, particularly East Siberia.
Falcated Duck
Falcated Teal
Falcated Duck
After the Gadwall, the next closest relative is the Eurasian Wigeon (not the Teal); Falcated Duck hybrids with Eurasian Wigeon flocks have been recorded in the Far East.
Falcated Drake
Falcated Teal
Falcated Teals
The male has a green iridescent patch on his head reminiscent of teals, a grey body plumage with intricate patterns and long plumes on his lower back.
Falcated Duck eclipse
Falcated Duck eclipse
Falcated Ducks female
The male in eclipse plumage (above left/centre) looks similar to the female (above right), who has has a plainer, cryptic brown plumage and plain head.