Ключевые слова: animal, ape, bar, behind, brown, cage, caged, captivity, close, cute, environment, escape, exhibit, experiment, expression, face, fur, hairy, hand, hooded, iron, jail, laboratory, locked, lonely, male, mammal, metal, monkey, natural, nature, primate, prison, sad, sadness, science, sciureus, small, solitude, species, squirrel, stress, tame, upset, urban, wild, wildlife, woman, young, zoo,