Alouatta sara
Silhouette: PhyloPic
In 3 days ~60% in a week ~90%
The Bolivian red howler (Alouatta sara) is a species of howler monkey, a type of New World monkey, endemic to Bolivia. It can be found in rain forests, including riverine and seasonally flooded forests. The Bolivian red howler is a part of the Atelidae; Atelidae are a subfamily of New World monkey, which includes the various spider and woolly monkeys. They are covered in reddish orange hair. The red howler are found only in neotropical South America in places like Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Perú, Suriname, Trinidad and Tobago, and Venezuela. They extend from northwest Colombia east and south to the Amazon River in eastern Brazil. They can be largely found in tropical forests, as well as in riverine and seasonally swamped woodlands and in forests above 1000 meters (3280 feet) above sea level, humid and dry forest high terra firma. They stay in the high altitudes.
The adult Bolivian red howler has a well-built body that is capable of attaining a maximum body length. Red howler monkeys have a muscular, prehensile tail that enables them to grasp branches or even swing from them. The males are about 20.6 -22.4 inches...
Recording0:36
Peru · 2010
© dbeadle · iNaturalist · CC BY-NC 4.0
Recording0:27
Bolivia · 2025
© Carlos Justiniano Parada · iNaturalist · CC BY-NC 4.0
Recording0:30
Peru · 2024
© Hubert Szczygieł · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Madidi National Park | 🇧🇴 Bolivia | |
| 2 | Tambopata National Reserve | 🇵🇪 Peru | |
| 3 | Manu National Park | 🇵🇪 Peru |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | ZooParc de Beauval | 🇫🇷 France | |
| 2 | Tierpark Berlin | 🇩🇪 Germany | |
| 3 | Senda Verde (Wildlife Sanctuary) | 🇧🇴 Bolivia | |
| 4 | Zoológico de Fauna Sudamericana | 🇧🇴 Bolivia |
Possible
About 30% of wildlife watchers report a Bolivian Red Howler Monkey sighting in Madidi National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 9 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.
May, August and October
In those months about 40% of wildlife watchers report a Bolivian Red Howler Monkey in Madidi National Park on a given day, against about 10% in November to April, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Bolivian Red Howler 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.
Yes
Of the 3 parks where we can rate Bolivian Red Howler Monkey sightings, Madidi National Park has the highest daily chance: about 30%. Next come Tambopata National Reserve (Peru, about 20%) and Manu National Park (Peru, about 20%).
GBIF citizen-science records
It is estimated from how often the Bolivian Red Howler Monkey is recorded against all the mammals logged in Madidi National Park (8 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.
