Sibon nebulatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~50%
Sibon nebulatus, commonly known as the cloudy snail-eating snake, is a species of small, slender arboreal snake which is found in southern Mexico, Central America, northern South America, Isla Margarita, and Trinidad and Tobago.
The body colour of S. nebulatus varies from grey to brown with dark brown irregular ring-like crossbands. These crossbands are edged by fine, irregular, beige spots. The belly ranges from white to beige, speckled with tiny dark brown points. The labial scale on the upper lip behind the eye is enlarged. In cloud forests of northwestern Ecuador, S. nebulatus is often confused with another snake, the Elegant Snail-Eater (Dipsas elegans), which can be distinguished by its pairs of narrow vertical bars between which there is a more pale bar, as opposed to the unpaired vertical bars of S. nebulatus.
Boos, Hans E.A. (2001). The Snakes of Trinidad and Tobago. College Station, Texas: Texas A&M University Press. ISBN 1-58544-116-3. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 2 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 3 | Main Ridge Forest Reserve | 🇹🇹 Trinidad and Tobago | |
| 4 | Tayrona National Natural Park | 🇨🇴 Colombia | |
| 5 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 6 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 7 | Tortuguero National Park | 🇨🇷 Costa Rica | |
| 8 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 9 | Cahuita National Park | 🇨🇷 Costa Rica | |
| 10 | Calakmul Biosphere Reserve | 🇲🇽 Mexico | |
| 11 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 12 | La Amistad International Park (Panama) | 🇵🇦 Panama |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Medellín | 🇨🇴 Colombia |
With luck
About 10% of wildlife watchers report a Cloudy Snail-eating Snake sighting in Calakmul Biosphere Reserve 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 46 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.
July
In that month about 20% of wildlife watchers report a Cloudy Snail-eating Snake in Calakmul Biosphere Reserve on a given day, against under 5% in May–June and August–March, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Cloudy Snail-eating Snake sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
10th of 12
Of the 12 parks where we can rate Cloudy Snail-eating Snake sightings, Calakmul Biosphere Reserve ranks 10th at about 10%. The best odds are in Braulio Carrillo National Park (Costa Rica, about 30%), Tenorio Volcano National Park (Costa Rica, about 30%) and Main Ridge Forest Reserve (Trinidad and Tobago, about 30%).
Same family: Colubridae
The closest relatives of the Cloudy Snail-eating Snake that you can see in Calakmul Biosphere Reserve (family Colubridae, Colubrid Snakes) are Speckled Racer (about 30%), Black-striped Snake (about 20%) and Faded Black-striped Snake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cloudy Snail-eating Snake is recorded against all the reptiles logged in Calakmul Biosphere Reserve (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.
