Chironius quadricarinatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~50%
Chironius quadricarinatus, the central sipo, is a species of nonvenomous snake in the family Colubridae. The species is found in Brazil, Paraguay, and Bolivia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manu National Park | 🇵🇪 Peru | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador |
With luck
About 10% of wildlife watchers report a Central Sipo sighting in Yasuní National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 39th most-seen of the 49 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Central Sipo in Yasuní National Park on a given day, against under 5% in February, April–June and October–December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Central Sipo sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 parks where we can rate Central Sipo sightings, Yasuní National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Manu National Park (Peru, about 10%).
Same genus: Chironius
The closest relatives of the Central Sipo that you can see in Yasuní National Park (genus Chironius, Sipos) are Wagler's Sipo (about 20%) and South American Sipo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Central Sipo is recorded against all the reptiles logged in Yasuní National Park (6 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.
