Images courtesy Zanna Clay.
Dr Zanna Clay from the University of Birmingham has been studying wild bonobo apes, one of our closest primate relatives, since 2007.
Latest research shows they have communication skills which were previously thought to be unique to humans. The bonobos use a single, high-pitched call or 'peep' in different situations, meaning their fellow primates have to work out what they mean from the context. This sound is remarkably similar to the noises made by a human infant.
Dr Zanna Clay talks to Kathryn Ryan.