Anguilla, Antigua And Barbuda, Aruba, Bahamas, Barbados, Belize, Bermuda, Canada (B) (P), Cayman Islands, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, Grenada, Guadeloupe, Guatemala, Haiti, Honduras, Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Panama, Puerto Rico, St Kitts And Nevis, St Lucia, St Pierre and Miquelon (B) (P), St Vincent and The Grenadines, Trinidad and Tobago, Turks and Caicos Islands, USA (B), Venezuela, Virgin Islands (British) (NB), Virgin Islands (U.S.) (NB).
Vagrant to Algeria, Austria, Belgium, Cape Verde, Denmark, Faroe Islands, Finland, France, Germany, Iceland, Ireland, Jamaica, Japan, Morocco, Netherlands, Norway, Poland, Portugal, Spain, Sweden, Switzerland, United Kingdom.
Central Alaska and central Canada east to Newfoundland, south to central and western USA, as far south as northern California, Colorado and Great Lakes region.
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is 1,500,000 (2010).
Ring-necked Duck (Aythya collaris) [XC170970]
by Paul Driver from Northampton (near Southampton), Bucks County, Pennsylvania, United States (call)
Ring-necked Duck (Aythya collaris) [XC76645]
by Paul Driver from Vernon Marsh, Waukesha County, Wisconsin, United States (flight call)
Subspecies
Considered by some to form superspecies with New Zealand Scaup (Aythya novaeseelandiae) and Tufted Duck (Aythya fuligula), although probably affinities closer to Canvasback (Aythya valisineria), Common Pochard (Aythya ferina) and Redhead (Aythya americana).
BirdLife International Species Factsheet