American Wigeons swim across the glossy Walden Ponds at sunset, Colorado Wildlife, Birds Swimming Across Ponds

american wigeon walden ponds ringnecked duck wood ducks pond water eurasian collareddoves anas americana surface feed lake bird duck habitat animal round waterfowl birding wetland marsh shrubs fall winter brown cattail hunting protected conserved land safety migration landing warm autumn active swimming outdoor wings 4k wide nature quiet calm swim twig dark murky sewage toxic