Which swan migrates from Iceland to Britain and Ireland each winter?

The whooper swan migrates from Iceland to Britain and Ireland each winter.

Most Icelandic whooper swans leave their breeding grounds in autumn, crossing the North Atlantic to spend winter in Britain and Ireland. They return north in spring to breed on Icelandic wetlands.

Whooper swans are large, long-necked swans with yellow-and-black bills. They are closely related to Bewick's swans, which also migrate between northern breeding grounds and western Europe, so the two are sometimes confused. The whooper swan is generally larger and has a more extensively yellow bill.

Unlike the largely resident mute swan in much of Britain, the Icelandic population of whooper swans is strongly migratory. Other whooper swan populations breed across northern Eurasia and follow different routes, including migrations into continental Europe and Asia.