The Bewick’s or Tundra Swan (Cygnus columbianus) is a small Holarctic swan. As their common name implies, the Tundra Swan breeds in the Arctic and subarctic tundra, where they inhabit shallow pools, lakes and rivers. These birds, unlike Mute Swans (C. olor) but like the other Arctic swans, are migratory birds. The winter habitat of both subspecies is grassland and marshland, often near the coast; they like to visit fields after harvest to feed on discarded grains and while on migration may stop over on mountain lakes.
Factsheet: Tundra Swan Cygnus columbianus