Editing Dryas monkey (section)

== Behaviour ==
This species is very social, and lives in groups that are either made up of their own species exclusively or within groups of mixed species. Visual and oral communication is very important, whether communicating to other Dryas monkeys or to other species. When living exclusively amongst each other, troops are made up of up to 30 individuals. Troops include many young offspring and females, but only contain one male. When females reproduce, they have only one young, and the [[gestation period]] lasts five months. Offspring are fully mature and ready to reproduce themselves after three years of life. The expected lifespan in the wild is 10–15 years, and because currently no Dryas monkeys are in captivity, that lifespan is unknown.<ref name=iucn/>  
Their movement occurs with a gait pattern involving all four limbs (quadrupedal).
 
As communication is very important to this species,  they have a unique way of communicating with one another. An example is staring, which is a display used as a threat. The eyes stay fixed as the eyebrows rise and the scalp is retracted. The facial skin becomes stretched and the ears move back. These movements expose the eyelids, which are a different color and heavily contrasts with their facial color. Staring with open mouth is another threat expression that often goes along with head-bobbing. Head-bobbing, another threat display, is thought to be more aggressive. Presenting behavior is used by females during the mating season, showing males they are ready to mate.<ref>Estes, R.D. 1991. ''[https://books.google.com/books?id=g977LsZHpcsC The Behavior Guide to African Mammals]''. University of California Press.</ref>