Dendrelaphis tristis
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~60%
Dendrelaphis tristis (Common bronzeback or Daudin's bronzeback) is a species of colubrid tree-snake found in South Asia. It is not venomous, and harmless to humans. Dendrelaphis tristis belongs to the genus Dendrelaphis, which contains 48 other described species.
Dendrelaphis is one of five genera belonging to the vine snake subfamily Ahaetuliinae, of which Dendrelaphis is most closely related to Chrysopelea, as shown in the cladogram below: Dendrelaphis tristis is found in Sri Lanka, India, Bangladesh, Nepal, Myanmar, Pakistan, and Bhutan, although its presence is uncertain in Myanmar, Bhutan, and Pakistan. It is diurnal and fully arboreal. It lives in various types of forests, from dry deciduous to semi-evergreen, and has even been reported in urban gardens and parks.
Dendrelaphis tristis is a long, slender snake with a pointed head and a bronze-coloured line running right down its back. It is camouflaged among the leaves because of its uniform ruddy brown skin. Its diet includes geckos, garden lizards, frogs, and small birds. It is not venomous, and harmless to humans.
The snake has oviparous... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Wilpattu National Park | 🇱🇰 Sri Lanka | |
| 2 | Minneriya National Park | 🇱🇰 Sri Lanka |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jabalpur | 🇮🇳 India | |
| 2 | Visakhapatnam | 🇮🇳 India | |
| 3 | Hyderabad | 🇮🇳 India | |
| 4 | Kolkata | 🇮🇳 India | |
| 5 | Chennai | 🇮🇳 India |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Nehru Zoological Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Common Bronzeback Tree Snake sighting in Kolkata on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 11th most-seen of the 14 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July–August and October
In those months about 20% of wildlife watchers report a Common Bronzeback Tree Snake in Kolkata on a given day, against under 5% in March, June, September and November–January, the lowest months. Those are among Kolkata's wettest months, with about 260 mm of rain a month against 10 mm in December.
Between 5 and 8 am
Across all the parks we cover, that three-hour window holds the most Common Bronzeback Tree Snake sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 5
Of the 5 cities where we can rate Common Bronzeback Tree Snake sightings, Kolkata ranks 4th at about 10%. The best odds are in Jabalpur (India, about 40%), Visakhapatnam (India, about 40%) and Hyderabad (India, about 10%).
Same family: Colubridae
The closest relatives of the Common Bronzeback Tree Snake that you can see in Kolkata (family Colubridae, Colubrid Snakes) are Chequered Keelback (about 30%), Dhaman (about 20%) and Indian Wolf Snake (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Bronzeback Tree Snake is recorded against all the reptiles logged in Kolkata (8 verified sightings), 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.
