Aotus lemurinus
Silhouette: Kai Caspar · PhyloPic
In 3 days ~20% in a week ~30%
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.
There have been up to four subspecies of the gray-bellied night monkey. All but the nominate subspecies have been elevated to full species rank. The three species formally considered subspecies are: Brumback's night monkey, Aotus brumbacki
Gray-handed night monkey, Aotus griseimembra Panamanian night monkey, Aotus zonalis Additionally, Hershkovitz's night monkey Aotus hershkovitzi is now considered to be a junior synonym for A. lemurinus. Like other members of their genus, this species is nocturnal; its small, round head is striped with black and is dominated by two large, brown eyes. The overall effect is not unlike an owl; the monkey's eyes shine a reddish orange by reflected light. Its white eyebrows are bushy, with a patch of darker fur between them. Its grey fur is described as dense... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Farallones de Cali National Natural Park | 🇨🇴 Colombia | |
| 2 | Los Nevados National Natural Park | 🇨🇴 Colombia |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Parque Zoologico Guátika | 🇨🇴 Colombia | |
| 2 | Edinburgh Zoo | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Colombian Night Monkey sighting in Los Nevados National Natural Park on a given day, based on 16 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 6 mammals we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
July and September–April
In those months about 10% of wildlife watchers report a Colombian Night Monkey in Los Nevados National Natural Park on a given day, against under 5% in May–June and August, the lowest months.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Colombian Night Monkey sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 2 parks where we can rate Colombian Night Monkey sightings, Los Nevados National Natural Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Farallones de Cali National Natural Park (Colombia, about 10%).
GBIF citizen-science records
It is estimated from how often the Colombian Night Monkey is recorded against all the mammals logged in Los Nevados National Natural Park (16 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
