Trimeresurus insularis
Silhouette: Steven Traver · PhyloPic
In 3 days >90%
Trimeresurus insularis, commonly known as the Indonesian pit viper, Lesser Sunda Islands pit viper, Komodo Island pit viper, Sunda white-lipped pit viper or red-tailed pit viper, also popularly known as blue pit viper, blue viper or blue insularis, is a species of venomous pit viper found in eastern Java and the Lesser Sunda Islands.
The scalation includes 21 rows of dorsal scales at midbody, 156–164/156–167 ventral scales in males/females, 70–75/54–59 subcaudal scales in males/females, and 7–12 supralabial scales. Their color patterns are often found to be green or blue-green, with specific populations even containing yellow variants as well.
It is found in Indonesia on eastern Java, Adonara, Alor, Bali, Flores, Komodo, Lombok, Padar, Rinca, Romang, Rote, Sumba, Sumbawa, Timor and Wetar. They are also found in neighboring Timor-Leste. The type locality given is "Soe, Timor". They are arboreal and can be found in dry monsoon forests at elevations up to 1,200 m (3,900 ft) above sea level.
Kramer, E. 1977. Zur Schlangenfauna Nepals. Rev. suisse Zool. 84 (3): 721–761. (Trimeresurus albolabris insularis, p.... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Komodo National Park | 🇮🇩 Indonesia | |
| 2 | Bali Barat National Park | 🇮🇩 Indonesia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denpasar | 🇮🇩 Indonesia |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Moscow Zoo | 🇷🇺 Russia | |
| 2 | Cabarceno Natural Park | 🇪🇸 Spain | |
| 3 | Zoo Pilsen | 🇨🇿 Czechia | |
| 4 | Bronx Zoo | 🇺🇸 United States | |
| 5 | Chester Zoo | 🇬🇧 United Kingdom | |
| 6 | Dallas Zoo | 🇺🇸 United States | |
| 7 | Phoenix Zoo | 🇺🇸 United States | |
| 8 | Toledo Zoo | 🇺🇸 United States | |
| 9 | Jacksonville Zoo and Gardens | 🇺🇸 United States | |
| 10 | Saint Louis Zoo | 🇺🇸 United States | |
| 11 | Terra Natura Benidorm | 🇪🇸 Spain | |
| 12 | Fort Worth Zoo | 🇺🇸 United States | |
| 13 | Gembira Loka Zoo | 🇮🇩 Indonesia | |
| 14 | Cameron Park Zoo | 🇺🇸 United States | |
| 15 | Faunia | 🇪🇸 Spain | |
| 16 | Reptile Gardens | 🇺🇸 United States | |
| 17 | Bali Bird Park | 🇮🇩 Indonesia | |
| 18 | Universeum | 🇸🇪 Sweden | |
| 19 | BXSea Aquarium | 🇮🇩 Indonesia |
Likely
About 60% of wildlife watchers report a White-lipped Island Pitviper sighting in Komodo National Park on a given day, based on 79 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 19 reptiles we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
January and April
In those months about 80% of wildlife watchers report a White-lipped Island Pitviper in Komodo National Park on a given day, against about 40% in July and August, the lowest months. Those are among Komodo National Park's wettest months, with about 140 mm of rain a month against 10 mm in August.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most White-lipped Island Pitviper sightings with a recorded time, and about 8 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 Island Pitviper sightings, Komodo National Park has the highest daily chance: about 60%. Next come Bali Barat National Park (Indonesia, about 30%).
GBIF citizen-science records
It is estimated from how often the White-lipped Island Pitviper is recorded against all the reptiles logged in Komodo National Park (79 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.
