Gray-bellied night monkey
Aotus lemurinus I. Geoffroy Saint-Hilaire, 1843
The gray-bellied night monkey (Aotus lemurinus) is a species in the family Aotidae, order Primates. Recorded adults weigh 800 g to 874 g and live up to 31.8 years. Its IUCN Red List status is Vulnerable.

Quick facts about the gray-bellied night monkey
- Weight
- 800 g – 874 gsrc for Weight
- Length
- Not recorded
- Lifespan
- 31.8 yearssrc for Lifespan
- Diet
- Herbivoresrc for Diet
- Longest recorded lifespan
- 33.8 years
- Main food
- Not recorded
- Habitat
- Not recorded
- Gestation
- 135 dayssrc for Gestation
- Young per litter or clutch
- 1src for Young per litter or clutch
- Age at maturity
- 2.07 yearssrc for Age at maturity
- Litters or clutches a year
- 1src for Litters or clutches a year
- Active
- At night (nocturnal)src for Active
- Lifestyle
- Arborealsrc for Lifestyle
- Conservation status
- Vulnerable (IUCN)src for Conservation status
- Countries on record
- Not recorded
Where does the gray-bellied night monkey live?
Not recorded
What is the gray-bellied night monkey?
The gray-bellied night monkey (Aotus lemurinus), also called the grey-legged douroucouli or lemurine owl monkey, is a small New World monkey of the family Aotidae. Native to tropical and subtropical forests of South America, the gray-bellied night monkey faces a significant threat from hunting, harvesting for use in pharmaceutical research and habitat destruction.
From the Wikipedia article “Gray-bellied night monkey” (en.wikipedia.org/w/index.php?title=Gray-bellied_night_monkey&oldid=1379698554), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.
Is the gray-bellied night monkey endangered?
The gray-bellied night monkey is listed as Vulnerable on the IUCN Red List: it faces a high risk of extinction in the wild.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- EXExtinct
Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Vulnerable species.
How is the gray-bellied night monkey classified?
- kingdomAnimalia
- phylumChordata
- classMammalia
- orderPrimates
- familyAotidae
- genusAotus
- SpeciesAotus lemurinus I. Geoffroy Saint-Hilaire, 1843
Synonyms Aotus aversus, Aotus hershkovitzi, Aotus lanius, Aotus pervigilis, Nyctipithecus hirsutus, Nyctipithecus villosus
Other names and names in other languages (24)
- Colombian night monkeyEnglish
- Colombian night monkeyEnglish
- Colombian night monkeyEnglish
- Lemurine night monkeyEnglish
- Lemurine night monkeyEnglish
- قرد الليل ذو البطن الرماديArabic
- mirikina lemuříCzech
- Kolumbianischer NachtaffeGerman
- Νυχτοπίθηκος της ΚολομβίαςGreek
- MartejaSpanish
- Mico De Noche AndinoSpanish
- mico dormilónSpanish
- Mono NocturnoSpanish
- Mono nocturno lemurinoSpanish
- mäkiyöapinaFinnish
- panamanyöapinaFinnish
- Douroucouli lémurienFrench
- szürke kezű éji majomHungarian
- コロンビアヨザルJapanese
- GrijsbuiknachtaapjeDutch
- ponocnica lemurowataPolish
- Macaco-da-noite-cinzentoPortuguese
- Macaco-da-noite-da-colômbiaPortuguese
- 鬼夜猴Chinese
Relatives of the gray-bellied night monkey
Other species in the same genus Aotus.

Three-striped night monkey
Aotus trivirgatus

Azara's night monkey
Aotus azarae

Peruvian night monkey
Aotus miconax

Black-headed night monkey
Aotus nigriceps

Spix's night monkey
Aotus vociferans
Gray-legged night monkey
Aotus griseimembra
CompareGray-bellied night monkey vs Three-striped night monkeyGray-bellied night monkey vs Azara's night monkeyGray-bellied night monkey vs Peruvian night monkeyGray-bellied night monkey vs Black-headed night monkey
Common questions
Answered only where our data holds the answer.
How big is the gray-bellied night monkey?
An adult gray-bellied night monkey weighs 800 g – 874 g, according to values recorded on Wikidata.
Is the gray-bellied night monkey endangered?
The gray-bellied night monkey is listed as Vulnerable on the IUCN Red List, meaning it faces a high risk of extinction in the wild.
How long does the gray-bellied night monkey live?
The gray-bellied night monkey has a recorded lifespan of 31.8 years.
How long is the gray-bellied night monkey pregnant?
The recorded gestation period is 135 days.
What kind of animal is the gray-bellied night monkey?
The gray-bellied night monkey (Aotus lemurinus) belongs to the family Aotidae in the order Primates.
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1 - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Gray-bellied night monkey (Aotus lemurinus). Retrieved from https://creaturedata.com/animals/gray-bellied-night-monkey
“Gray-bellied night monkey (Aotus lemurinus).” CreatureData, 2026, https://creaturedata.com/animals/gray-bellied-night-monkey.
@misc{gray_bellied_night_monkey_2026,
title = {Gray-bellied night monkey (Aotus lemurinus)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/gray-bellied-night-monkey},
note = {Data as of 2026-11-11}
}