Two researchers have described what they found during more than eight months spent among chimpanzees in their natural habitat the forest: We were quite surprised to observe that there is no single distinct social unit in chimpanzee society.

• 通过在黑猩猩的自然栖息地森林中对它们进行了八个月的观察，两名研究人员得出这样结论：“我们注意到在黑猩猩的社会中似乎没有任何一种独立的社会基本单位，这一点令我们很吃惊。