Psychologists from Durham University, UK have found in their study that bonobos produce a variety of signals including "baby-like" signals to strategically display distress when they are attacked by other bonobos.
source https://www.lifetechnology.com/blogs/life-technology-science-news/bonobos-receive-consolation-from-bystanders-when-producing-baby-like-signals-to-express-their-emotional-distress
