Chironius fuscus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
The brown sipo (Chironius fuscus) is a species of snake of the family Colubridae. The snake is found in South America and Central America. Species Chironius fuscus at The Reptile Database Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 2 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 3 | Manu National Park | 🇵🇪 Peru | |
| 4 | Tambopata National Reserve | 🇵🇪 Peru | |
| 5 | Tijuca National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rio de Janeiro | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Brown Sipo sighting in Tijuca National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 12th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
September and November–May
In those months about 10% of wildlife watchers report a Brown Sipo in Tijuca National Park on a given day, against under 5% in June–August and October, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Brown Sipo sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
5th of 5
Of the 5 parks where we can rate Brown Sipo sightings, Tijuca National Park ranks 5th at about 10%. The best odds are in Brownsberg Nature Park (Suriname, about 30%), Serra dos Órgãos National Park (Brazil, about 30%) and Manu National Park (Peru, about 20%).
Same genus: Chironius
The closest relatives of the Brown Sipo that you can see in Tijuca National Park (genus Chironius, Sipos) are Two-headed Sipo (about 10%) and Coastal Sipo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Brown Sipo is recorded against all the reptiles logged in Tijuca National Park (10 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.
