Grey-shanked Douc Langur

Grey-shanked doucs are diurnal and primarily arboreal. They move about through trees by jumping and brachiating. In the past they have been found in groups as large as fifty individuals but those numbers have been greatly reduced to 4 to 15 individuals. Males are the dominant gender and dominance hierarchies have been observed while in captivity. The grey-shanked douc langur communicates using touch, visual communication, and sound. Growls are used to show aggression. They can be used as a threat or warning toward other individuals. A soft, twitter sound is used when being submissive. Grey-shanked doucs also engage in grooming to remove parasites and to establish and strengthen bonds between group members. This is usually done before resting for the night. Group members will also spar with each other. Sparring is a type of aggressive behavior in which participants will slap, pull, and grab each other. Visual communication includes facial expressions and various postures. Facial expressions include grimacing, which is used to show submissiveness, play face, which is used to play with another group member, and staring which suggests either curiosity or aggression. Facial expressions are also used during courtship. …