Tropidolaemus wagleri
Silhouette: Steven Traver · PhyloPic
In 3 days ~70% in a week ~90%
Tropidolaemus wagleri, more commonly known as Wagler's pit viper, is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Southeast Asia. There are no subspecies that are recognized as being valid. It is sometimes referred to as the temple viper because of its abundance around the Temple of the Azure Cloud in Malaysia.
The specific name, wagleri, is in honour of German herpetologist Johann Georg Wagler. The Wagler's pit viper is sexually dimorphic: the females grow to approximately 1 m (39+1⁄4 in) in total length (including tail), their bodies being black with yellow stripes. Males, on the other hand, typically do not exceed 75 cm (29+1⁄2 in). Males have large triangular-shaped heads, with relatively thin green bodies. They are almost entirely arboreal, and their tails are prehensile to aid in climbing.
They are found in a wide variety of colors and patterns, often referred to as "phases". In the past, some researchers classified the different phases as subspecies. The phases vary greatly from having a black or brown coloration as a base, with orange and yellow banding, to others having... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 2 | Khao Sok National Park | 🇹🇭 Thailand | |
| 3 | Taman Negara National Park | 🇲🇾 Malaysia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore | |
| 2 | Kuala Lumpur | 🇲🇾 Malaysia |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Los Angeles Zoo | 🇺🇸 United States | |
| 2 | Jacksonville Zoo and Gardens | 🇺🇸 United States | |
| 3 | National Zoo of Malaysia | 🇲🇾 Malaysia | |
| 4 | Fort Worth Zoo | 🇺🇸 United States | |
| 5 | Gembira Loka Zoo | 🇮🇩 Indonesia | |
| 6 | Siam Serpentarium | 🇹🇭 Thailand | |
| 7 | Entopia | 🇲🇾 Malaysia | |
| 8 | BXSea Aquarium | 🇮🇩 Indonesia |
No species of the same family or order lives in Taman Negara National Park, so these are its closest relatives here: other reptiles.
Possible
About 30% of wildlife watchers report a Wagler's Pit Viper sighting in Taman Negara National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 6th most-seen of the 17 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.
December
In that month about 60% of wildlife watchers report a Wagler's Pit Viper in Taman Negara National Park on a given day, against under 5% in March–April, July and October, the lowest months. That is one of Taman Negara National Park's wettest months, with about 290 mm of rain against 100 mm in March.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Wagler's Pit Viper sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 3
Of the 3 parks where we can rate Wagler's Pit Viper sightings, Taman Negara National Park ranks 3rd at about 30%. The best odds are in Gunung Leuser National Park (Indonesia, about 70%) and Khao Sok National Park (Thailand, about 50%).
GBIF citizen-science records
It is estimated from how often the Wagler's Pit Viper is recorded against all the reptiles logged in Taman Negara National Park (14 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.
