Ключевые слова: alone, animal, autumn, background, bill, biology, bird, black, blue, cable, cloud, cute, electric, electricity, environment, fauna, feather, flight, flock, fly, gray, group, high, line, martin, migration, nature, object, ornithology, outdoor, power, resting, row, scene, singer, single, sit, sky, spring, summer, swallow, telephone, white, wild, wildlife, wing, wire,