The Ring-necked Duck (Aythya collaris) is a smaller diving duck found in wooded lakes or ponds in the northern United States and Canada.
The adult male has a grey bill with a white band, a shiny purple head, a white breast, yellow eyes and a dark grey back. The adult female has a pale brown head and body with a dark brown back, a dark bill with a more subtle light band than the male and brown eyes. The cinnamon neck ring is usually difficult to observe.
The nest is bowl-shaped, built with aquatic vegetation and lined with down, in a dry location near open water. The female lays 8 to 10 eggs and may remain with the young until they are able to fly.
They overwinter in the southern United States usually in lakes, ponds, rivers or bays.
This strong migrant is a rare but regular vagrant to Western Europe.
These birds feed mainly by diving. They eat aquatic plants as well as some mollusks, aquatic insects and small fish.