Mute swan (cygnus olor) portrait, hertfordshire, uk

vertebrates britain water migrate waterbird birds animals hunters monogamous wildlife carnivorous nature united kingdom predator vertical waterbirds verticals migrates cygnusportrait predation english zoology aquatic social portraits hertfordshire vertebrate migratory carnivore predators cygnus developed countries cygnus british swans migrating developed country european england anatidae monogamy anseriformes hunter fauna cygnus animal europe