The phenomenon has been described by authors in the University of St Andrews in Scotland saying that the messages ranged from "simple requests related with just little gestures to broader social negotiation associated with a vast range of gesture types."
In relation to research, some of the gestures were used to convey only one meaning, whereas others were more ambiguous and could have multiple meanings.
The study found the difference between the functions served by gestures and voices, noting that despite the application of oral messages among other primates like apes and monkeys, it did not appear that voices were used intentionally to communicate messages.
This is the crucial difference between calls and gestures, was described by the lead researcher Catherine Hobaiter, since chimps use gestures as a communication system to convey messages to others.
“That’s what’s so amazing about chimp gestures,” said Hobaiter. “They’re the only thing that looks like human language in that respect.”
Her colleague in the same university Richard Byrne reveals this, “What we've shown is a very rich system of many different meanings.” “We have the closest thing to human language that you can see in nature.”