Ключевые слова: alive, animal, barn swallow, bird, birds, black, blue, day, europe, flock, group, habitat, hirundininae, horizontal, many, martin, music notes, nature, nobody, notes, ornithology, outdoor, outdoors, passerine, peace, peaceful, power line, power lines, rest, resting, rustica, sit, sitting, sky, summer, swallow, swallows, wild, wildlife,