Trimeresurus stejnegeri
Silhouette: Steven Traver · PhyloPic
In 3 days ~80% in a week >90%
Trimeresurus stejnegeri is a species of venomous pit viper endemic to Asia. Two subspecies are currently recognized, including the nominate subspecies described here. Common names for this pit viper include Stejneger's pit viper, Chinese pit viper, Chinese green tree viper, bamboo viper, Chinese bamboo pitviper, Chinese bamboo viper, and Chinese tree viper. For other common, non-scientific names, see § Common names below.
The specific name, stejnegeri, is in honor of Leonhard Stejneger, the Norwegian-born, American herpetologist who worked at the Smithsonian Institution for over 60 years. Trimeresurus stejnegeri grows to a maximum total length of 75 centimetres (30 in), which includes a tail length of 14.5 centimetres (5.7 in). The males have hemipenes that are short and spinose beyond the bifurcation.
The dorsal scales are arranged in 21 longitudinal rows at midbody. There are 9–11 upper labials, of which the first are separated from nasal scales by a distinct suture. The supraoculars are single, narrow, and sometimes divided by a transverse suture. There are 11–16 scales in a line between the supraoculars. The ventrals number 150–174, and the subcaudals... Wikipedia →
Recording0:06
China · 2026
© pheonix_qiu · iNaturalist · CC BY-NC 4.0
Recording0:12
Taiwan · 2024
© 歐陽秀華 · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Taroko National Park | 🇹🇼 Taiwan |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Toronto Zoo | 🇨🇦 Canada | |
| 2 | Hangzhou Zoo | 🇨🇳 China |
Likely
About 40% of wildlife watchers report a Chinese Green Tree Viper sighting in Cuc Phuong National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 7th most-seen of the 16 reptiles we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
June, September–October and December
In those months about 60% of wildlife watchers report a Chinese Green Tree Viper in Cuc Phuong National Park on a given day, against under 5% in April–May and July, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Chinese Green Tree 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 2 parks where we can rate Chinese Green Tree Viper sightings, Cuc Phuong National Park has the highest daily chance: about 40%. Next come Taroko National Park (Taiwan, about 20%).
GBIF citizen-science records
It is estimated from how often the Chinese Green Tree Viper is recorded against all the reptiles logged in Cuc Phuong National Park (11 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.
