1, A. collaris, Anatiadae, Animalia, Anseriformes, Anthya collaris, April, Aves, Aythya, Aythyinae, Chordata, Hooded merganser, L. cucullatus, Lophodytes cucullatus, Merginae, North America, US, USA, Wisconsin, adult, alone, animal, aquatic, bird, black, black & white, breeding, brown, dimorphic, diving duck, duck, environment, fauna, habitat, hood, lake, land, male, merganser, natural, nature, north american, north woods, northern, northwoods, one, outdoors, outside, plumage, plummage, pond, ring necked, ring-necked duck, ringbill, ringnecked, river, single, spring, springtime, stream, swim, swimming, water, wet, wet land, wetland, white, wild, wildlife, yellow eye