A. collaris, American birds, Anatiadae, Animalia, Anseriformes, April, Aves, Aythya, Aythya collaris, Chordata, North America, US, USA, Wisconsin, Wisconsin lake, adult, avian, bird, birding, birdlife, birdwatching, breeding plumage, couple, diving duck, drake, drake and hen, drake duck, drake ring-necked duck, duck, fauna, feathers, hen, hen ring-necked duck, hen ringneck, lake, male, male and female, male duck, male ring-necked duck, male ringed-neck duck, male ringneck, mates, mating season, natural, nature, north american, northern, northern Wisconsin, northern lake, northwoods, ornithology, pair, pair of ring-necks, pair of ringnecks, ring-necked duck, ringneck, ringneck duck, seabird, spring, spring time, springtime, swim, swimming, swimming together, together, water, waterfowl, waterway, wetland, wild, wilderness lake, wildlife