Ключевые слова: adult lion, african lion, animal, apathy, aviary, background, behavior, big cat, biology, blade of grass, calm, calmness, captivity, care, carefree, cat, conservation, daytime sleep, drowsiness, earth, ecology, fauna, grace, grass, green, imitation of nature, lazy, lion, mammal, mane, natural environment, observation, power, predator, predatory, protection, relaxed, rest, resting predator, roost, safety, serenity, sleep, sleeping, sleepy kingdom, sleepy lion, slumber, sun, territory, vigilance, warmth, wildlife, zoo,