Ключевые слова: animal, animals, avian, biodiversity, bird, birds, color, colors, colour, colours, dabbling duck, dabbling ducks, duck, ducks, eurasian wigeon, eurasian wigeons, european wigeon, european wigeons, fauna, fuji five lakes, fujihakoneizu national park, honshu, japan, lake yamanako, male, mareca penelope, natural, nature, one, ornithology, vertebrate, vertebrates, waterbird, waterbirds, waterfowl, widgeon, widgeons, wigeon, wigeons, wild, wildlife, yamanakako, yamanashi prefecture, zoology,