Close up of a black-necked swan swimming on a lake sinking its body underwater searching for food

looking migration water specie searching wilderness neck blacknecked aquatic pond palmate feathers head palmation habitat delicate environment swim south american swan cygnus lagoon flock wings food native underwater bill feet vegetation lake white natural migratory peaceful fauna behavior float waterfowl plumage exoticism coverts sink melancoryphus beak bird nature black wild