Calamaria hilleniusi
Silhouette: Mason McNair · PhyloPic
In 3 days ~20% in a week ~50%
Calamaria hilleniusi is a species of snake in the subfamily Calamariinae of the family Colubridae. The species is native to Oceania and Southeast Asia. The specific name, hilleniusi, is in honor of Dutch herpetologist Dick Hillenius.
Calamaria hilleniusi is found in Brunei, Indonesia, and Malaysia. The preferred natural habitat of Calamaria hillenius is forest. Calamaria hilleniusi is terrestrial and semi-fossorial. Calamaria hilleniusi is oviparous.
Das, Indraneil (2006). A Photographic Guide to Snakes and other Reptiles of Borneo. Sanibel Island, Florida: Ralph Curtis Books. 144 pp. ISBN 0-88359-061-1. (Calamaria hilleniusi, p. 8). Inger, Robert F.; Marx, Hymen (1965). "The Systematics and Evolution of the Oriental Colubrid Snakes of the Genus Calamaria". Fieldiana: Zoology 49: 1-304. (Calamaria hilleniusi, new species, pp. 96–99, Figure 25).
Inger, Robert F.; Voris, Harold K. (2001). "The biogeographical relations of the frogs and snakes of Sundaland". Journal of Biogeography 28: 863–891. Stuebing, Robert B.; Inger, Robert F.; Lardner, Björn (2014)... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia | |
| 2 | Sepilok | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Samarinda Reed Snake sighting in Sepilok on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 32nd most-seen of the 34 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.
October and December
In those months about 20% of wildlife watchers report a Samarinda Reed Snake in Sepilok on a given day, against under 5% in January–February, April–June, August–September and November, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Samarinda Reed Snake sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 2 parks where we can rate Samarinda Reed Snake sightings, Sepilok ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Kinabalu Park (Malaysia, about 10%).
Same family: Colubridae
The closest relatives of the Samarinda Reed Snake that you can see in Sepilok (family Colubridae, Colubrid Snakes) are Paradise Flying Snake (about 30%), Gray Bronzeback (about 30%) and Red-tailed Green Ratsnake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Samarinda Reed Snake is recorded against all the reptiles logged in Sepilok (6 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.
