Ключевые слова: air, alte donau, animal, austria, austrian, background, bird, birds, blue hour, blue sky, bright, clear sky, clouds, colorful, colourful, common, concept, distant, evening, far, fauna, flock, flying, life, lifestyle, lots, many, migrate, migrating, migration, moving, natural, orange, pattern, reserve, silhouettes, sky, sunset, thousands, tree, twilight, typical, vienna, wild, wild life, wildlife, wing,