Long-tailed ducks have a fairly large range compared to other waterfowl. Its biogeographic range, including breeding and non-breeding seasons, has been estimated to include 10,800,000 km2. Long-tailed ducks are residents of the circumpolar region and are regularly found breeding on the Arctic coasts of Canada, Alaska, United States of America, Greenland, Iceland, Norway, and Russia. They winter further south in the United Kingdom, North America, Korea and on the Black and Caspian Seas.
Biogeographic Regions: nearctic (Native ); palearctic (Native ); oriental (Native ); arctic ocean (Native ); atlantic ocean (Native ); pacific ocean (Native )
Other Geographic Terms: holarctic