Ключевые слова: animal, background, barn, bird, black, blue, city, common, delichon, electric, electricity, filter, flock, fly, group, guitar, house, lines, many, martin, migratory, musical, nature, northern, on, outdoor, peaceful, power, powerline, score, sit, sky, society, soft, space, species, spring, summer, swallow, swallows, telephone, the, urbicum, white, wild, wildlife, wings, wire,