Ключевые слова: anatidae, animals, arcuata, avian, beak, beautiful, beauty, bird, bright, conservation, couple, dendrocygna, dendrocygne, duck, environment, feather, geese, horsfield, india, indian, indochina, javanica, javapfeifgans, lake, lesser, marshland, monotypic, nature, ornithology, pond, pool, preservation, river, siffleur, spring, swans, swimming, thailand, water, waterbird, wetland, whistling, whistlingduck, wild, wilderness, wildlife, wing, zoology,