The Northern Night Monkey, also known as Aotus azarai, is a primate species native to South America. Synonyms for this unique nocturnal creature include Northern Owl Monkey, Brazilian Owl Monkey, Bolivian Night Monkey, and Southern Night Monkey. These alternative names refer to different geographical subgroups within the Aotus azarai species, each dwelling in distinct regions like Brazil, Bolivia, and southern South America. Despite variations in their habitats, behavior, and physical characteristics, they share common traits such as nocturnal activity, large eyes for enhanced night vision, and a diet rich in fruits, leaves, and insects. With a plethora of synonyms, the Northern Night Monkey exemplifies the diversity found within the world of primates.