Nicholas R. answered 10/14/22
Biology- Experienced and Customizable
Hello Zahra,
A while back I did some observational work with the Dallas Zoo on flamingos, so I wasn't exactly closely observing the Primates. However, I did have the opportunity to make some observations after hours. In terms of behaviors and facial expressions, I assume you mean in regard to shared simian behaviors. Some of my observations made were very similar i.e. the pairing of family groups, utilizing hands for gesturing, and even seeming to smile (the curling of the upper lip to show teeth). Most primate behaviors are similar to our own as Humans but they also aren't exactly identical behaviors. I hope this answers your question and please respond if you have further questions!
Thanks,
Nicholas