Ring-necked Duck(immature male,not yet in first winter plumage)
Taken in small, freshwater pond, Lewiston, Idaho near Snake River. Only duck present.
Location is 450 miles inland of Pacific.
first thought was female Ring-necked Duck, after checking several field guides not so sure.
No eye ring, no white at base of bill, no gray cheek. Bird was diving with regularity so wet feathers make head shape difficult.
several other photos taken, but all field marks look the same.