Close up of a black necked-swan floating on a pond while sinking underwater looking for food

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