Chironius foveatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
Chironius foveatus, the South American or coastal sipo, is a semi-arboreal (Harrington et al. 2018) species of non-venomous snake in the family Colubridae, found in Brazil. It primarily inhabits the southern and eastern coastal regions of the country, such as the states of Bahia, Santa Catarina, Espírito Santo and Rio de Janeiro, as well as the municipalities of Rio Fortuna and Ilhéus. It has also been observed on Ilha Grande.
Local Portuguese names include cipó, cobra-cipó, cobra-cipó verde, cobra verde, caninana, caninana-verde-de-cabeça-preta, cobra-espada and serra-velha (English: 'vine', 'vine-snake', 'green vine-snake', 'green snake', 'cane', 'black-headed green cane', 'sword-snake' and 'mountain-man'). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 2 | Tijuca National Park | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Coastal Sipo sighting in Tijuca National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 13th 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.
April and October–February
In those months about 10% of wildlife watchers report a Coastal Sipo in Tijuca National Park on a given day, against under 5% in March and May–September, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Coastal Sipo sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Coastal Sipo sightings, Tijuca National Park ranks 2nd at about 10%. The best odds are in Serra dos Órgãos National Park (Brazil, about 20%).
Same genus: Chironius
The closest relatives of the Coastal Sipo that you can see in Tijuca National Park (genus Chironius, Sipos) are Brown Sipo (about 10%) and Two-headed Sipo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Coastal Sipo is recorded against all the reptiles logged in Tijuca National Park (9 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.
