Trimeresurus albolabris
Silhouette: Steven Traver · PhyloPic
In 3 days ~70% in a week ~90%
Trimeresurus albolabris, the white-lipped pit viper or white-lipped tree viper, is a venomous pit viper species endemic to Southeast Asia. Giannasi et al. (2001) raised insularis and septentrionalis to species level. Malhotra & Thorpe (2004) transferred this species (and a number of others) to the genus Cryptelytrops. David et al. (2011) returned it to the genus Trimeresurus and assigned it the subgenus Trimeresurus, creating the new combination Trimeresurus (Trimeresurus) albolabris.
Common names include green tree pit viper, white-lipped pit viper, white-lipped tree viper, white-lipped green pit viper and white-lipped bamboo pit viper. Maximum total length males 600 mm (24 in), females 810 mm (32 in); maximum tail length males 120 mm (4.7 in), females 130 mm (5.1 in). Head scalation consists of 10–11(12) upper labials, the first partially or completely fused to the nasal. Head scales small, subequal, feebly imbricate, smooth or weakly keeled. The supraoculars are narrow (occasionally enlarged and undivided) with 8–12 interocular scales between them. Temporal scales smooth.
Midbody has 29 (rarely 19) longitudinal dorsal scale rows. The ventral scales... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 2 | Cat Tien National Park | 🇻🇳 Vietnam |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Moscow Zoo | 🇷🇺 Russia | |
| 2 | Kadoorie Farm and Botanic Garden | 🇭🇰 Hong Kong SAR China | |
| 3 | Kyiv Zoo | 🇺🇦 Ukraine | |
| 4 | Terra Natura Benidorm | 🇪🇸 Spain | |
| 5 | Houston Zoo | 🇺🇸 United States | |
| 6 | ABQ BioPark Zoo | 🇺🇸 United States | |
| 7 | Gembira Loka Zoo | 🇮🇩 Indonesia | |
| 8 | Little Rock Zoo | 🇺🇸 United States | |
| 9 | Dong Tam Snake Farm | 🇻🇳 Vietnam | |
| 10 | Alligator Adventure | 🇺🇸 United States | |
| 11 | Siam Serpentarium | 🇹🇭 Thailand | |
| 12 | Snake Farm of Queen Saovabha Memorial Institute | 🇹🇭 Thailand | |
| 13 | Reptiland | 🇫🇷 France | |
| 14 | BXSea Aquarium | 🇮🇩 Indonesia | |
| 15 | Тульский экзотариум (новая экспозиция) | 🇷🇺 Russia |
No species of the same family or order lives in Kaeng Krachan National Park, so these are its closest relatives here: other reptiles.
Possible
About 30% of wildlife watchers report a White-lipped Pit Viper sighting in Kaeng Krachan National Park on a given day, based on 76 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 56 reptiles we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
September
In that month about 70% of wildlife watchers report a White-lipped Pit Viper in Kaeng Krachan National Park on a given day, against about 10% in January and February, the lowest months. That is one of Kaeng Krachan National Park's wettest months, with about 260 mm of rain against 30 mm in December.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most White-lipped Pit Viper sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate White-lipped Pit Viper sightings, Kaeng Krachan National Park has the highest daily chance: about 30%. Next come Cat Tien National Park (Vietnam, about 20%).
GBIF citizen-science records
It is estimated from how often the White-lipped Pit Viper is recorded against all the reptiles logged in Kaeng Krachan National Park (76 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.
