Ключевые слова: altitude, animal, animals, apus, apus apus, background, beak, beautiful, bird, birdwatching, black, blue, boomerang, closeup, common, common swift, europe, eye, fast, fastest, fauna, feather, feathers, flight, fly, freedom, germany, glider, habitat, hunting, insectivorous, nature, ornithology, outdoor, outdoors, predator, quick, sky, speed, spring, summer, swallow, swift, swifts, tail, white, wild, wilderness, wildlife, wing,