Xenochrophis trianguligerus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~60% in a week ~90%
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 30% of wildlife watchers report a Triangle Keelback sighting in Bako National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 15th most-seen of the 20 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
July
In that month about 50% of wildlife watchers report a Triangle Keelback in Bako National Park on a given day, against under 5% in February–May and November, the lowest months. That is one of Bako National Park's driest months, with about 160 mm of rain against 440 mm in January.
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.
Among the best
Of the 6 parks where we can rate Triangle Keelback sightings, Bako National Park ranks 3rd at about 30%, level with the leaders once rounded. The best odds are in Danum Valley Conservation Area (Malaysia, about 30%) and Khao Luang National Park (Thailand, about 30%).
Same family: Colubridae
The closest relatives of the Triangle Keelback that you can see in Bako National Park (family Colubridae, Colubrid Snakes) are Common Bronze-back (about 40%), Oriental Whipsnake (about 40%) and Gray Bronzeback (about 40%), 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 Bako National Park (9 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.
