A local legend that they are the descendants of monkeys used to enhance the scenery for the Tarzan movies that were shot in the area in the 1930s is not true, since no Tarzan movie filmed in the area featured rhesus macaques.
Also, a colony of non-native rhesus macaques were  introduced to the park in early 1938 by a tour boat operator, known locally as "Colonel Tooey", to enhance his "Jungle Cruise" ride.