the mute swan cygnus olor, group of adult white swans resting on sandy shore of black sea

cygnus olor swan swans bird birds aves anseriformes anatidae waterfowl aquatic wildlife fauna ornithology closeup nature sea water coastal white plumage beak redbeak wetland migration wings feathers elegance beauty cygnini birdwatching habitat ecosystem wildbird avian marine animals avifauna cygnet feather float mute seabird wild wing red