Close up of a black-necked swan floating on a lake while eating with its beak underwater

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