Snoozing lake duck Oxyura vittata with bill under wing on lake edge

oxyura vittata lake duck waterfowl female snooze argentine lake duck oxyura duck argentine ruddy duck birdwatching largest avian reproductive organ birdlife shallow focus closeup bird aves ornithology nature wildlife wild avian plumage no people nobody environment anatidae anseriformes static outdoors nature scene telephoto sleep rest relaxed brown natural ecology riverbank wildfowl waterbird fauna