A black necked swan, cygnus melancoryphus diving under the water foraging for aquatic invertebrates and gracefully stretch its neck back up the wavy lake, close up static shot

wing black necked swan cygnus melancoryphus waterfowl south america anatidae freshwater marsh lake bird wild wildlife animal nature natural habitat environment close up water beak ornithology argentina underwing waterbird feather beautiful swim pond buenos aires park birdwatching neck river aquatic elegant white dive eat graceful food majestic spin vegetation forage plant bill