Saimiri boliviensis
Silhouette: PhyloPic
In 3 days ~90% in a week >90%
The black-capped squirrel monkey (Saimiri boliviensis) is a species of New-World monkey native to the upper Amazon basin in Bolivia, western Brazil and eastern Peru. They weigh between 365 and 1,135 g (13 and 40 oz) and measure, from the head to the base of the tail, between 225 and 370 mm (9 and 15 in). The black-capped squirrel monkey is primarily tree-dwelling and is found in both native and plantation forests as well as some farmed areas near running water. Its diet is omnivorous and mostly consists of flowers, fruit, leaves, nuts, seeds, insects, arachnids, eggs and small vertebrates. It mostly lives in female-dominated troops of around 40 to 75 monkeys, with males having been observed to disperse to live in all-male troops after reaching sexual maturation.
The black-capped squirrel monkey displays sexual dimorphism, with males normally weighing between 550 and 1,135 g (19... Wikipedia →
Call1:12
Peru · 2024
© Richard E. Webster · XC963913 · CC BY-NC-SA 4.0
Recording0:14
Bolivia · 2022
© jgaglione · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tambopata National Reserve | 🇵🇪 Peru | |
| 2 | Manu National Park | 🇵🇪 Peru |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santa Cruz de la Sierra | 🇧🇴 Bolivia |
Likely
About 50% of wildlife watchers report a Black-capped Squirrel Monkey sighting in Tambopata National Reserve on a given day, based on 146 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 2nd most-seen of the 28 mammals we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
November
In that month about 70% of wildlife watchers report a Black-capped Squirrel Monkey in Tambopata National Reserve on a given day, against about 40% in January and June–July, the lowest months. That is one of Tambopata National Reserve's wettest months, with about 310 mm of rain against 45 mm in July.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Black-capped Squirrel Monkey sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Black-capped Squirrel Monkey sightings, Tambopata National Reserve has the highest daily chance: about 50%. Next come Manu National Park (Peru, about 50%).
GBIF citizen-science records
It is estimated from how often the Black-capped Squirrel Monkey is recorded against all the mammals logged in Tambopata National Reserve (146 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.
