Ключевые слова: animal, asbestic tile, background, beak, beautiful, bird, birding, birds, birdwatching, black, breed, camo, camouflage, collect, common, common house martin, delichon urbicum, environment, europe, european, fauna, feather, garden, gray, habitat, home, house, house martin, housemartin, martin, material, natural, nature, nest, ornithology, outdoors, perched, plumage, species, spring, summer, swallow, urban, white, wild, wildlife, wing, wings,