English: Two Macaques in the w:Ubud Monkey Forest; a mother and her child.
Date 9 October 2005
Author Jack Merridew https://commons.wikimedia.org/wiki/User:Jack_Merridew
Source: https://commons.wikimedia.org/wiki/File:Macaques_in_Ubud_Monkey_Forest-mother_and_child.jpeg

The crab-eating macaque (Macaca fascicularis), also known as the long-tailed macaque, is a cercopithecine primate native to Southeast Asia. It is referred to as the cynomolgus monkey in laboratories. It has a long history alongside humans; they have been alternately seen as agricultural pests, sacred animals in some temples, and more recently, the subject of medical experiments. The crab-eating macaque lives in matrilineal social groups with a female dominance hierarchy,[ and male members leave the group when they reach puberty.