Ключевые слова: air, animal, animals, apus apus, aves, avian, avifauna, beak, beautiful, bird, birds, black, blue, color, color image, colour, common swift, common swifts, crete, daylight, daytime, ecology, europe, european swift, fauna, feather, feathers, flight, fly, freedom, greece, horizontal, natural, nature, ornithology, outdoor, outdoors, sky, swift, swifts, white, wild, wildlife, wing, wings, world,