A. collaris, Anatiadae, Animalia, Anseriformes, Anthya collaris, April, Aves, Aythya, Aythyinae, Chordata, North America, US, USA, Wisconsin, adult, animal, beautiful, bird, black, breeding, breeding plumage, brown, diving duck, drake, duck, environment, fauna, feathers, habitat, lake, male, marsh, natural, nature, north american, north woods, northern, northwoods, outdoors, outside, plumage, plummage, pond, ring necked, ring-necked, ring-necked duck, ringbill, ringnecked, river, single, spring, spring time, springtime, stream, swim, swimming, water, waterfowl, wetland, wetlands wetland wet land pond, white, wild, wildlife, yellow eye