Female long-tailed duck (Clangula hyemalis). This duck is found in Alaska, northern Canada, northern Europe and Russia. It migrates to the eastern and western coasts of North America and the coastal regions of Europe and Asia. It is a diving duck that feeds on molluscs, crustaceans and small fish. This duck is capable of diving to a depth of around 60 metres. Photographed in Sussex, UK, in January.