Senticolis triaspis
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~60%
Senticolis is a genus of nonvenomous snake in the family Colubridae. The genus Senticolis is monotypic, containing the sole species Senticolis triaspis, also known as the green rat snake. The species is endemic to Central America, Mexico, southern Arizona, and southern New Mexico.
Senticolis triaspis may grow to a total length (including tail) of 160 cm (63 in). Dorsally, it is green or olive green, and ventrally it is light yellow. The head is elongated, the body is slender, and the smooth dorsal scales are arranged in 31–39 rows.
Senticolis triaspis usually inhabits evergreen forests and grassland. Senticolis triaspis is well distributed in the Baboquivari, Pajarito, Atascosa, Santa Rita, Empire, Patagonia, Chiricahua, Swisshelm, Pedregosa, and Peloncillo mountains of southeastern Arizona.
Senticolis triaspis consumes small animals such as lizards, birds, and bats, killing them by deadly constriction. Senticolis triaspis is primarily diurnal. An adult female of S. triaspis is able to lay up to nine eggs in a clutch.
Three subspecies are recognized as being valid, including... Wikipedia →
Recording0:13
Mexico · 2024
© @NaturaGto · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Santa Rosa National Park | 🇨🇷 Costa Rica | |
| 2 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tegucigalpa | 🇭🇳 Honduras | |
| 2 | San José | 🇨🇷 Costa Rica | |
| 3 | Guadalajara | 🇲🇽 México |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Columbus Zoo and Aquarium | 🇺🇸 United States | |
| 2 | Zoológico la pastroa | 🇲🇽 Mexico | |
| 3 | Arizona-Sonora Desert Museum | 🇺🇸 United States | |
| 4 | Zoobotânico de São José do Rio Preto | 🇧🇷 Brazil | |
| 5 | OdySea Aquarium | 🇺🇸 United States | |
| 6 | Exotarium Oberhof | 🇩🇪 Germany | |
| 7 | Zoológico Miguél Álvarez del Toro | 🇲🇽 Mexico |
With luck
About 10% of wildlife watchers report a Green Rat Snake sighting in Monteverde Cloud Forest Reserve on a given day, based on 25 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 43 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
December and January
In those months about 20% of wildlife watchers report a Green Rat Snake in Monteverde Cloud Forest Reserve on a given day, against under 5% in October, the lowest month. Those are among Monteverde Cloud Forest Reserve's driest months, with about 120 mm of rain a month against 510 mm in October.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Green Rat Snake 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.
2nd of 2
Of the 2 parks where we can rate Green Rat Snake sightings, Monteverde Cloud Forest Reserve ranks 2nd at about 10%. The best odds are in Santa Rosa National Park (Costa Rica, about 20%).
Same family: Colubridae
The closest relatives of the Green Rat Snake that you can see in Monteverde Cloud Forest Reserve (family Colubridae, Colubrid Snakes) are Chicken Snake (about 10%), Puffing Snake (about 10%) and Double-banded Coral Snake Mimic (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Green Rat Snake is recorded against all the reptiles logged in Monteverde Cloud Forest Reserve (25 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.
