Ключевые слова: africa, african, animal, behaviour, big, creature, danger, dangerous, environment, fauna, green, grey, group, head, herbivore, herd, hippo, hippopotamus, huge, lake, large, mammal, mara, national park, nature, outdoor, pachyderm, park, pond, pool, reserve, river, safari, savanna, savannah, serengeti, species, stone, strong, submerged, swimming, tanzania, travel, tropical, water, wet, wild, wilderness, wildlife, zoology,