In the East, RINGNECKS frequently associate with Scaups and with powerful glasses they can be identified more by actions than by plumage. Males raise their heads with a distinctive undulating movement of the neck and roach head feathers. I have not noticed these peculiarities in females.
When Ducks were sold in open market I remember seeing them mixed in with Broadbills.
They usually gather in small flocks, preferring fresh or brackish streams for feeding. Expert divers, wary and swift awing, Ringnecks probably will continue to survive.
North America. Rare in eastern part of its range. Nowhere common.