Green-winged Teal - Eurasian Subspecies

This Eurasian form of Green-winged Teal (also referred to as a Common Teal) was seen on Coffee Lake just outside of Wilsonville, OR. The two are very similar in appearance with the most obvious difference being the Eurasian's lack of a vertical white stripe in the shoulder area and the addition of a thin white horizontal line on its side which is missing on the American variety. The Eurasian also has a more pronounced and continuous creamy line that circles the front of its cheek, just behind the bill and around the eye.
While fairly rare in North America it is not unusual to hear reports of their sighting here in the winter.
While still considered the same species, the AOU is still debating whether to separate them.