Trimeresurus vogeli
Silhouette: Steven Traver · PhyloPic
In 3 days ~90% in a week >90%
Trimeresurus vogeli, commonly known as the Vogel's pit viper, is a venomous pitviper species native to Southeast Asia. The specific name, vogeli, is in honor of German herpetologist Gernot Vogel. Trimeresurus vogeli is found in Cambodia, Laos, Thailand, and Vietnam.
The preferred natural habitats of Trimeresurus vogeli are forest and savanna, at altitudes of 200–1,200 m (660–3,940 ft). Trimeresurus vogeli is large for its genus, and exhibits definite sexual dimorphism. Males may attain a snout-to-vent length (SVL) of 0.8 m (2.6 ft). Females are longer, and may exceed 1.1 m (3.6 ft) in SVL.
Trimeresurus vogeli is viviparous. Chan-ard T, Parr JWK, Nabhitabhata J (2015). A Field Guide to the Reptiles of Thailand. New York: Oxford University Press. 352 pp. ISBN 978-0-19-973649-2 (hardcover), ISBN 978-0-19-973650-8 (paperback). (Viridovipera vogeli, p. 288).
David P, Vidal N, Pauwels OSG (2001). "A Morphological Study of Stejneger's Pitviper Trimeresurus stejnegeri (Serpentes, Viperidae, Crotalinae), with the Description of a New Species from Thailand". Russian... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
Likely
About 60% of wildlife watchers report a Vogel’s Pit Viper sighting in Khao Yai National Park on a given day, based on 173 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the most-seen of the 46 reptiles we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
July–August and October–November
In those months about 80% of wildlife watchers report a Vogel’s Pit Viper in Khao Yai National Park on a given day, against about 40% in December and January, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Vogel’s Pit Viper sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Khao Yai National Park, in our data
Khao Yai National Park is the only park on Wallace's Line with enough records to rate Vogel’s Pit Viper sightings: about 60% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Vogel’s Pit Viper is recorded against all the reptiles logged in Khao Yai National Park (173 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.
