Chironius multiventris
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
Chironius multiventris, commonly known as the long-tailed machete savane, is species of colubrid snake. It is found in Peru, northern Venezuela, Colombia in the Guainía and Trinidad and Tobago. The body is elongate, and strongly laterally compressed. The tail is long, as the common name implies. The dorsum is olive to light brown. There is a narrow whitish, black-edged, vertebral stripe. The upper labials and the ventrum are yellowish.
The ventrals are 178–183, and the subcaudals are 172–202. (Both these counts are higher than in C. carinatus.) The dorsal scales are arranged in 12 rows anteriorly and at midbody, in 10 rows posteriorly. (C. carinatus has 8 rows posteriorly.)
Adults may attain a total length of 136 cm (4 ft 6 in), with a tail 56 cm (22 in) long. Chironius multiventris feeds on frogs. Boos, Hans E.A. (2001). The snakes of Trinidad and Tobago. Texas A&M University Press, College Station, TX. ISBN 1-58544-116-3. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Brownsberg Nature Park | 🇸🇷 Suriname | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador | |
| 3 | Manu National Park | 🇵🇪 Peru |
With luck
About 10% of wildlife watchers report a South American Sipo sighting in Manu National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 52nd most-seen of the 56 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.
June
In that month about 20% of wildlife watchers report a South American Sipo in Manu National Park on a given day, against under 5% in March–May, July–September and December–January, the lowest months. That is one of Manu National Park's driest months, with about 80 mm of rain against 290 mm in February.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most South American Sipo sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
3rd of 3
Of the 3 parks where we can rate South American Sipo sightings, Manu National Park ranks 3rd at about 10%. The best odds are in Brownsberg Nature Park (Suriname, about 20%) and Yasuní National Park (Ecuador, about 10%).
Same genus: Chironius
The closest relatives of the South American Sipo that you can see in Manu National Park (genus Chironius, Sipos) are Brown Sipo (about 20%) and Central Sipo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the South American Sipo is recorded against all the reptiles logged in Manu National Park (5 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.
