Chironius scurrulus
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~70% in a week ~90%
Chironius scurrulus, commonly known as the smooth machete savane, is a large slender colubrid snake. It is also known as Wagler's sipo. It is found in tropical rainforests of the Brazilian Amazon, Southeastern Colombia, northern Bolivia, Ecuador, east of Venezuela, Peru, Trinidad and Tobago, Guyana, Suriname, French Guiana.
The dorsal scales are in only 10 rows. It feeds on frogs and lizards. They are diurnal. They live in primary and secondary forest habitats, on the ground or small trees, or in shrubs and bushes. Boos, Hans E.A. (2001). The snakes of Trinidad and Tobago. Texas A&M University Press, College Station, TX. ISBN 1-58544-116-3.
Wagler, J.G. 1824. Serpentum Brasiliensium species novae, ou histoire naturelle des espèces nouvelles de serpens. In: J.B. Spix. Animalia nova sive species novae. pp. 1–75. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuyabeno Wildlife Reserve | 🇪🇨 Ecuador | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador |
Possible
About 30% of wildlife watchers report a Wagler's Sipo sighting in Cuyabeno Wildlife Reserve on a given day, based on 17 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 21 reptiles we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
April
In that month about 50% of wildlife watchers report a Wagler's Sipo in Cuyabeno Wildlife Reserve on a given day, against under 5% in February–March, June and November, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Wagler's Sipo sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Wagler's Sipo sightings, Cuyabeno Wildlife Reserve has the highest daily chance: about 30%. Next come Yasuní National Park (Ecuador, about 20%).
Same family: Colubridae
The closest relatives of the Wagler's Sipo that you can see in Cuyabeno Wildlife Reserve (family Colubridae, Colubrid Snakes) are Blunthead Tree Snake (about 20%), Mountain Keelback (about 10%) and Wucherer's Ground Snake (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Wagler's Sipo is recorded against all the reptiles logged in Cuyabeno Wildlife Reserve (17 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.
