Tropidolaemus wagleri
Silhouette: Steven Traver · PhyloPic
In 3 days >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 |
Very likely
About 70% of wildlife watchers report a Wagler's Pit Viper sighting in Gunung Leuser National Park on a given day, based on 165 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the most-seen of the 47 reptiles we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
March, May–June and August
In those months about 80% of wildlife watchers report a Wagler's Pit Viper in Gunung Leuser National Park on a given day, against about 50% in February and September, the lowest months.
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.
Yes
Of the 3 parks where we can rate Wagler's Pit Viper sightings, Gunung Leuser National Park has the highest daily chance: about 70%. Next come Khao Sok National Park (Thailand, about 50%) and Taman Negara National Park (Malaysia, about 30%).
Same family: Viperidae
The closest relatives of the Wagler's Pit Viper that you can see in Gunung Leuser National Park (family Viperidae, Vipers) are Gunalen's Pitviper (about 20%), Sumatran Palm Pit Viper (about 20%) and Hagen’s Pitviper (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Wagler's Pit Viper is recorded against all the reptiles logged in Gunung Leuser National Park (165 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.
