Xenochrophis trianguligerus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~50% in a week ~80%
The triangle keelback (Xenochrophis trianguligerus) is a species of snake found in Brunei Darussalam, Burma (Myanmar), Cambodia, India (Nicobar Islands; Arunachal Pradesh (Deban - Changlang district)), Indonesia (Nias, Mentawai, Sumatra, Laos, Malaysia (Malaya and East Malaysia), Singapore, Thailand, and Vietnam.
The type locality is Java. Friedrich Boie 1827 Bemerkungen über Merrem's Versuch eines Systems der Amphibien, 1. Lieferung: Ophidier. Isis van Oken, Jena, 20: 508–566. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 2 | Khao Luang National Park | 🇹🇭 Thailand | |
| 3 | Bako National Park | 🇲🇾 Malaysia | |
| 4 | Khao Sok National Park | 🇹🇭 Thailand | |
| 5 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 6 | Kinabalu Park | 🇲🇾 Malaysia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia | |
| 2 | Bandung | 🇮🇩 Indonesia | |
| 3 | Kuala Lumpur | 🇲🇾 Malaysia |
Possible
About 20% of wildlife watchers report a Triangle Keelback sighting in Khao Sok National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 22nd most-seen of the 44 reptiles we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
September and October
In those months about 40% of wildlife watchers report a Triangle Keelback in Khao Sok National Park on a given day, against under 5% in March, May, August and December, the lowest months. Those are among Khao Sok National Park's wettest months, with about 280 mm of rain a month against 35 mm in February.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Triangle Keelback sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 parks where we can rate Triangle Keelback sightings, Khao Sok National Park ranks 4th at about 20%. The best odds are in Danum Valley Conservation Area (Malaysia, about 30%), Khao Luang National Park (Thailand, about 30%) and Bako National Park (Malaysia, about 30%).
Same family: Colubridae
The closest relatives of the Triangle Keelback that you can see in Khao Sok National Park (family Colubridae, Colubrid Snakes) are Western Mangrove Cat Snake (about 50%), Banded Keelback (about 40%) and Red-tailed Green Ratsnake (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Triangle Keelback is recorded against all the reptiles logged in Khao Sok National Park (11 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.
