Ключевые слова: animal, animals, aquatic, avian, biodiversity, bird, birds, blur, blurred, blurring, color, colors, colour, colours, dabbling duck, dabbling ducks, duck, ducks, eurasian wigeon, eurasian wigeons, european wigeon, european wigeons, fauna, freshwater, japan, lake yamanako, male, mareca penelope, move, movement, moving, natural, nature, ornithology, plumage, preen, preening, vertebrate, vertebrates, water, waterbird, waterbirds, waterfowl, widgeon, widgeons, wigeon, wigeons, wild, wildlife, zoology,