Oligodon sublineatus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~50% in a week ~80%
Oligodon sublineatus, commonly known as Dumeril's kukri snake is a species of rear-fanged kukri snake found in Sri Lanka. Body somewhat cylindrical and stout. Head short, and blunt. Dorsum pinkish-brown with small three rows of brown markings. Two lateral rows of linear marks confluent and usually from stripes. Median row of discontinuous spots ending at vent.
It is a common species from the plains and midhills of Sri Lanka. Widespread within he country. Known from the localities such as Kalutara, Mathugama, Gammaduwa, and Knuckles Mountain Range, Kotmale, Ratnapura, Weligalla, Negambo, Nawala, Gampola, Peradeniya, and Kandy in the central hills, as well as localities in dry northern parts of the island.
Found in thinly forested areas, often entering human habitation, and usually hides under leaf litter, at elevations up to 1200m. Active during the day as well as at dusk, particularly nocturnal. When threatened, it flattens its body but does not attempt to bite. The blade-like teeth are thought adaptive for cutting up shells of reptile eggs, and small lizards and frog eggs also consumed.
https://web.archive.org/web/20071008061903/http... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sinharaja Forest Reserve | 🇱🇰 Sri Lanka |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Duméril's Kukri Snake sighting in Sinharaja Forest Reserve on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 20th most-seen of the 32 reptiles we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
May
In that month about 50% of wildlife watchers report a Duméril's Kukri Snake in Sinharaja Forest Reserve on a given day, against under 5% in April and September–December, the lowest months. That is one of Sinharaja Forest Reserve's wettest months, with about 460 mm of rain against 150 mm in March.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Duméril's Kukri 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.
Only Sinharaja Forest Reserve, in our data
Sinharaja Forest Reserve is the only park on Wallace's Line with enough records to rate Duméril's Kukri Snake sightings: about 20% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Duméril's Kukri Snake is recorded against all the reptiles logged in Sinharaja Forest Reserve (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.
