Corallus annulatus
Silhouette: T. Michael Keesey (from a photo by Maximilian Paradiz) · PhyloPic
In 3 days ~20% in a week ~30%
Corallus annulatus, known as the ringed tree boa, annulated tree boa, and northern annulated tree boa, is a boa species found in Central and South America. Three subspecies are currently recognized, including the nominate subspecies described here. Like all boas, it is a non-venomous constrictor.
The color pattern consists of a brownish-red ground color overlaid with blackish rings or netlike reticulations. Found in Central America in eastern Guatemala, Honduras, Nicaragua, Costa Rica, Panama. Also in South America in Pacific Colombia and northwestern Ecuador. The type locality given is "Costa Rica."
Corallus annulatus at the Reptarium.cz Reptile Database. Accessed 14 July 2008. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Soberanía National Park | 🇵🇦 Panama | |
| 3 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | San Diego Zoo | 🇺🇸 United States | |
| 2 | Zoo Miami | 🇺🇸 United States | |
| 3 | San Diego Zoo Safari Park | 🇺🇸 United States | |
| 4 | Zoo Knoxville | 🇺🇸 United States | |
| 5 | Montgomery Zoo | 🇺🇸 United States | |
| 6 | Virginia Zoological Park | 🇺🇸 United States | |
| 7 | La Paz Waterfall Gardens | 🇨🇷 Costa Rica |
With luck
About 10% of wildlife watchers report a Ringed Tree Boa sighting in Arenal Volcano National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 54th most-seen of the 64 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
March, May–June, September and November
In those months about 10% of wildlife watchers report a Ringed Tree Boa in Arenal Volcano National Park on a given day, against under 5% in April, July–August, October and December–February, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Ringed Tree Boa sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
3rd of 3
Of the 3 parks where we can rate Ringed Tree Boa sightings, Arenal Volcano National Park ranks 3rd at about 10%. The best odds are in Braulio Carrillo National Park (Costa Rica, about 40%) and Soberanía National Park (Panama, about 10%).
GBIF citizen-science records
It is estimated from how often the Ringed Tree Boa is recorded against all the reptiles logged in Arenal Volcano National Park (7 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.
