Anatidae, Animalia, Anseriformes, April, Chordata, Hooded merganser, Lophodytes cucullatus, Merginae, North America, US, USA, Wisconsin, adult, animal, bird, breeding, breeding plumage, brown, call, calling, courting, courtship display, drake, duck, environment, fauna, habitat, lake, male, mating season, merganser, merganzer, natural, nature, north american, north woods, northern, northwoods, outdoors, plumage, pond, spring, spring time, springtime, stream, swim, swimming, water, waterfowl, wetland, wild, wildlife