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Northern night monkeys—also known as northern owl monkeys, three-striped night monkeys, or douroucoulis—are found north of the Amazon River, primarily between southern Venezuela and north-central Brazil.
Spix’s night monkeys are one of the few monkey species that are monochromats. Unlike some forms of color blindness in which the affected individual cannot distinguish between certain colors, night monkeys do not perceive color at all, seeing the world in black, white, and shades of gray.
Nov 18, 2022 · Ten night monkeys (Aotus lemurinus, five males and five females, age = 23.8 ± 6.8 y.o, body weight = 1.08 ± 0.08 kg) were used in this study. All animals were provided by the Center for the Evolutionary Origins of Human Behavior (former Primate Research Institute), Kyoto University (Inuyama, Japan).
Feb 1, 2022 · Out of the shadows: Multilocus systematics and biogeography of night monkeys suggest a Central Amazonian origin and a very recent widespread southeastward expansion in South America.
Night monkeys, also known as owl monkeys or douroucoulis [2] (/ d uː r uː ˈ k uː l i z /), are nocturnal New World monkeys of the genus Aotus, the only member of the family Aotidae (/ eɪ ˈ ɒ t ɪ d iː /). The genus comprises eleven species which are found across Panama and much of South America in primary and secondary forests, tropical ...
Conservation Status and Threats. Habitat loss due to increasing deforestation is the greatest threat to this species, and all rainforest species. The International Union for the Conservation of Nature classifies Nancy Ma’s night monkeys as Vulnerable (IUCN, 2021), with populations decreasing.
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Current information shows the existence of 504 species in 79 genera distributed in the Neotropics, mainland Africa, Madagascar, and Asia. Alarmingly, ~60% of primate species are now threatened with extinction and ~75% have declining populations.
