Sexual dimorphism in non-human primates
Sexual dimorphism describes the morphological, physiological, and behavioral differences between males and females of the same species. Most primates are sexually dimorphic for different biological characteristics, such as body size, canine tooth size, craniofacial structure, skeletal dimensions, pelage color and markings, and vocalization.
Source: Wikipedia — Sexual dimorphism in non-human primates (CC BY-SA 4.0)