Ключевые слова: activity, animal, animals, bats, beauty, behavior, calming, colors, creatures, dark, dusk, ecosystem, evening, flight, flying, freedom, gathering, group, habitat, horizon, hours, light, mammals, natural, nature, nocturnal, orange, outdoors, peaceful, purple, scene, serene, silhouette, sky, sunset, time, tranquil, transition, twilight, warm, wildlife,