Saimiri sciureus
Silhouette: PhyloPic
In 3 days ~60% in a week ~90%
The Guianan squirrel monkey (Saimiri sciureus) is a species of squirrel monkey from Guiana, Venezuela and Brazil. S. sciureus formerly applied to Humboldt's squirrel monkey and Collins' squirrel monkey, but genetic research in 2009 and 2015 revealed that these are distinct species.
Several now-separate squirrel monkey species were formerly considered a single species, Saimiri sciureus, generally known as the common squirrel monkey, with a wide range in the northern half of South America. A 2009 genetic study by Carretero-Pinzón, et al indicated Humboldt's squirrel monkey, S. cassiquiarensis, from Colombia, Peru and Ecuador, which had been considered a subspecies of S. sciureus, was actually more closely related to other squirrel monkey species. A 2015 genetic study by Lynch Alfaro, et al revealed that Collins' squirrel monkey, S. collinsi, from northeastern Brazil, which had also been considered a subspecies of S. sciureus, should also be treated as a separate species. This left S. sciureus to apply to the squirrel monkeys in northern Brazil and the Guianas. Lynch Alfaro's study also revealed that despite the gap in their ranges, the squirrel monkey species most... Wikipedia →
Call1:21
French Guiana · 2024
© Tristan Guillebot de Nerville · XC1147170 · CC BY-NC-SA 4.0
Call0:31
French Guiana · 2018
© Brice de la Croix · XC984452 · CC BY-NC-SA 4.0
Recording0:18
Brazil · 2026
© Davi Alencar · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anavilhanas National Park | 🇧🇷 Brazil |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Common Squirrel Monkey sighting in Anavilhanas National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 5 mammals we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
August to October
In those months about 40% of wildlife watchers report a Common Squirrel Monkey in Anavilhanas National Park on a given day, against under 5% in April–July and December, the lowest months. Those are among Anavilhanas National Park's driest months, with about 95 mm of rain a month against 340 mm in March.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Common Squirrel Monkey sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Anavilhanas National Park, in our data
Anavilhanas National Park is the only park on Wallace's Line with enough records to rate Common Squirrel Monkey sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Common Squirrel Monkey is recorded against all the mammals logged in Anavilhanas National Park (5 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.
