When it comes to the monkeys of Tiwai Island, Sierra Leone, these words have slightly different meanings. For example, Philippe Schlenker of the French National Center for Scientific Research explains that “krak” functions “as a general alarm call on Tiwai since there are no leopards in the island. In the Tai Forest, it is important for the monkeys to know whether the threat is coming from a leopard or not. After all the most important thing for monkeys is to survive, and they do so by communicating.