Editing Night monkey (section)

=== Sleep sites ===
During the daylight hours, night monkeys rest in shaded tree areas. These species have been observed exploiting four different types of tree nests, monkeys will rest in; holes formed in the trunks of trees, in concave sections of branches surrounded by creepers and epiphytes, in dense areas of epiphyte, climber and vine growth and in areas of dense foliage.<ref name="Aquino-1986">{{Cite journal|last1=Aquino|first1=Rolando|last2=Encarnación|first2=Filomeno|date=1986|title=Characteristics and use of sleeping sites in ''Aotus'' (Cebidae: Primates) in the Amazon lowlands of Peru|journal=American Journal of Primatology|volume=11|issue=4|pages=319–331|doi=10.1002/ajp.1350110403|pmid=31979438|s2cid=84650076|issn=0275-2565}}</ref> These sleeping sites provide protection from environmental stressors such as heavy rain, sunlight and heat. Sleeping sites are therefore carefully chosen based upon tree age, density of trees, availability of space for the group, ability of site to provide protection, ease of access to the site and availability of site with respect to daily routines.<ref name="Aquino-1986" /> While night monkeys are an arboreal species, nests have not been observed in higher strata of the rainforest ecosystem, rather a higher density of nests were recorded at low-mid vegetation levels.<ref name="Aquino-1986" /> Night monkeys represent a territorial species, territories are defended by conspecifics through the use of threatening and agonistic behaviours.<ref>{{Cite journal|last=Bates|first=Brian C.|date=September 1970|title=Territorial behavior in primates: A review of recent field studies|journal=Primates|volume=11|issue=3|pages=271–284|doi=10.1007/bf01793893|s2cid=46168799|issn=0032-8332}}</ref> Ranges between night monkey species often do overlap and result in interspecific aggressions such as vocalizing and chasing which may last up to an hour.<ref name="Ferndandez-Duque-2012" />