威斯康星州国家灵长类动物研究中心资深科学家，托尼·齐格勒表示，相似的结论也在鸟类和哺乳类中被发现，如狨属。
Similar results have been found in birds and in mammals like marmosets, said Toni Ziegler, a senior scientist at the Wisconsin National Primate Research Center.
Jared Taglialatela，一位叶克斯国家灵长类动物研究中心的研究员，说到：“他们表现出了与人类相似的各种复杂的交际和认知能力，他们有感觉，有想法，有目标。”
"They have been shown to have all kinds of complex communication and cognitive powers that are similar to humans, " said Clayton State University primate researcher Jared Taglialatela.
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