Stock photography, photos: Chimpanzee Stock photos of Portrait of a Chimpanzee looking Sad Photograph: © Elisabeth Cölfen Click for a larger image and more information Keywords associated with this stock photo: animal, animals, ape, apes, chimpanzee, chimpanzees, color, colour, despair, distress, emotion, emotional, emotions, feeling, glum, grief, horizontal, horizontals, mammal, mammals, monkey, monkeys, nature, outdoor, outdoors, outside, portrait, portraits, primate, primates, sad, sadness, simian, sorrow, unhappiness, unhappy, wildlife