Ключевые слова: alive, animal, background, beak, beauty, biodiversity, biology, bird, birdwatching, black, blue, cement, conservation, day, ecological, ecology, environment, environmental, fauna, feathers, grass, gray, green, greenery, grey, ground, growth, grub, guarding, horizontal, life, mockingbird, natural, nature, northern, organism, ornithology, outdoors, outside, scene, scenery, science, songbird, vegetation, vertebrate, warmblooded, wild, wildlife, wing, zoology,