Dendrelaphis nigroserratus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~50%
Dendrelaphis nigroserratus (common name: sawtooth-necked bronzeback) is a species of snakes belonging to the bronzebacks (Dendrelaphis). It is found only in western and southwestern Thailand and the adjacent southeastern Myanmar. A specimen has been preserved in the British Natural History Museum, London since the early 20th century. Due to its resemblance to Wall's bronzeback, the scientific name was formerly assigned under Dendrelaphis cyanochloris, the species name for Wall's bronzeback. It was formally described as a distinct species in 2012 by Gernot Vogel, Johan Van Rooijen and Sjon Hauser. According to the World Wide Fund for Nature report, it became one of the 367 important new species discovered in the Greater Mekong during 2012 and 2013.
Analayses show its significant differences from the typical Wall's bronzeback, including colouration and scales on the neck. Its most distinctive feature is the presence of sawtooth-shaped scales on the back of its neck. This feature is unique among the bronzeback species, and the reason for its common name. In general, they are also larger, the largest specimen measuring 1.63 m in length.
It is classified as "Least Concern" under the IUCN Red List of Threatened Species of 2014. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaeng Krachan National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a sawtooth-necked bronzeback sighting in Kaeng Krachan National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 39th most-seen of the 56 reptiles we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
August
In that month about 30% of wildlife watchers report a sawtooth-necked bronzeback in Kaeng Krachan National Park on a given day, against under 5% in June, September–October and December–February, the lowest months. That is one of Kaeng Krachan National Park's wettest months, with about 200 mm of rain against 30 mm in December.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most sawtooth-necked bronzeback sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Kaeng Krachan National Park, in our data
Kaeng Krachan National Park is the only park on Wallace's Line with enough records to rate sawtooth-necked bronzeback sightings: about 10% of wildlife watchers there report one on a given day.
Same genus: Dendrelaphis
The closest relatives of the sawtooth-necked bronzeback that you can see in Kaeng Krachan National Park (genus Dendrelaphis, Bronzebacks) are Common Bronze-back (about 10%) and Wall's Bronzeback (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the sawtooth-necked bronzeback is recorded against all the reptiles logged in Kaeng Krachan National Park (8 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.
