Ключевые слова: animal, animals, asia, asian, behavior, bird, birds, black, china, chinese, cleaning, closeup, coastal, crane, cranes, crown, crowned, east, endangered, face, feathers, gruidae, grus, grus japonensis, head, japan, japanese, japonensis, longevity, manchurian, ornithology, pet, pets, plumage, portrait, preening, rare, red, river, specie, species, threatened, typical, unique, water, wetlands, white, zoo, zoology,