Female Lake Duck Oxyura vittata bobbing at water surface, telephoto shot

oxyura vittata lake duck female largest avian reproductive organ bobbing water surface argentine lake duck waterbird argentine ruddy duck waterfowl birdlife duck swim shallow focus low angle closeup dam float bird aves birdwatching ornithology nature wildlife wild avian plumage no people nobody environment anatidae anseriformes waterbody paddle static outdoors nature scene oxyura water natural ecology wildfowl fauna ruddy