Sibynophis collaris
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~20% in a week ~40%
Sibynophis collaris, commonly known as the common many-toothed snake, Betty's many toothed snake or the collared black-headed snake, is a species of colubrid snake endemic to South and East Asia. Rostral scale twice as broad as deep, just visible from above; suture between the internasals shorter than that between the prefrontals; frontal longer than its distance from the end of the snout, as long as the parietals or shorter; loreal as long as or a little longer than deep; one preocular; two postoculars, only the upper in contact with the parietal; temporals 1 (or 2) + 2; 9 or 10 upper labials, fourth, fifth, and sixth entering the eye; 4 lower labials in contact with the anterior chin shields, which are as long as the posterior chin shields. Dorsal scales smooth, without apical pits, in 17 rows. Ventrals 159–190; anal divided; subcaudals divided, 102–131.
Brown above, vertebral region greyish, usually with a series of small round black spots; head with small black spots or vermiculations above, and two black crossbands, one across the posterior part of the frontal and supraoculars, the other across the occiput; a large black nuchal spot or crossband, bordered with... 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 Collared Black-headed Snake sighting in Kaeng Krachan National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 42nd 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 40%, if each day is a fresh chance.
December
In that month about 20% of wildlife watchers report a Collared Black-headed Snake in Kaeng Krachan National Park on a given day, against under 5% in January, March and May–September, the lowest months. That is one of Kaeng Krachan National Park's driest months, with about 30 mm of rain against 260 mm in September.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Collared Black-headed Snake 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 Collared Black-headed Snake sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Collared Black-headed Snake that you can see in Kaeng Krachan National Park (family Colubridae, Colubrid Snakes) are Oriental Whipsnake (about 40%), Small-banded Kukri Snake (about 20%) and Golden Tree Snake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Collared Black-headed Snake is recorded against all the reptiles logged in Kaeng Krachan National Park (7 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.
