Ключевые слова: africa, animal, ape, behavior, bush, captive, captivity, chimpanzee, cognitive, ecology, emotions, expression, expressive, fun, funny, funny face, gorilla, happiness, happy, hominid, humanoid, humorous, intellectual, intelligence, intelligent, laugh, meditating, monkey, nature, orangutan, orangutang, pets, primate, primitive, rain forest, rainforest, safari, smile, smiley face, speech, summer, talk, viewer, wildlife, zoo, zoo animals,