Ключевые слова: africa, african, amphibious, animal, aquatic, behavior, big, calm, cunning, dangerous, disguise, environment, eyes, fat, fauna, fixed, habitat, head, herbivore, herd, hidden, hide, hippo, hippopotamus, huge, invisible, lake, large, looking, mammal, nature, nostrils, peeping, river, safari, spy, stationary, stealth, stealth waiting, surface, watching, water, wild, wildlife,