Anatidae, Animalia, Anseriformes, April, Aves, Bucephala ableola, Bufflehead, Chordata, North America, US, USA, Wisconsin, bird, black, blue, blue water, breeding plumage, bucephala, changing colors, diving bird, diving duck, drake, drake bufflehead, drake duck, drake sea duck, duck, gamebird, green, iridescence, iridescent, lake, male, male bufflehead, male sea duck, migrant, migrating, migratory, natural, nature, north american, northern Wisconsin, northwoods, rainbow colors, sea duck, small duck, small sea duck, spirit duck, spring, striking plumage, swim, swimming, water, waterfowl, white, wild, wildlife