Bewick's Swan (Cygnus columbianus) close-up of head showing yellow and black beak, Slimbridge, UK

swan cold horizontals waterbird columbianus birds bird animals horizontal yellow wildlife slimbridge predator black waterbirds aquatic heads social bird winter siberia vertebrate carnivore swan british swans migrating developed country england uk migrating yellow monogamy cygnus necks europe uk britain vertebrates water migrate white white hunters wetland cgynus sociable monogamous head carnivorous eye nature united kingdom bewick's wetlands close up aves migrates predation english zoology beak migratory beaks swans meat predators arctic beak developed countries cygnus neck european anatidae anseriformes europe hunter fauna animal