Ключевые слова: animal, avian, beak, beautiful, bird, birdwatching, blackcrowned, crowned, danube, danube delta, danube river, delta, fauna, feather, flight, heron, juvenile, lake, landscape, natural, nature, nightheron, nycticorax, ornithology, outdoor, outdoors, predator, reed, reservation, river, romania, scenery, spring, tourism, travel, vegetation, view, water, wild, wilderness, wildlife, wildlife reserve,