Ключевые слова: animal, art, beautiful, bill, bird, black, blue, brown, bulgaria, closeup, color, cute, delichon urbica, departure, electricity, eye, fauna, feather, height, light, looking, martin, metal, migratory, mountain, nature, ornithology, outdoor, passerine, plana, relax, season, sit, sky, small, summer, swallow, swift, taking, two, volatile, waiting, white, wildlife, wing, wire,