Cantoria violacea
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~10% in a week ~20%
Cantoria violacea, commonly known as Cantor's water snake, is a species of snake found in tropical Asia. It is named in honor of the 19th century herpetologist Theodore Cantor. Rostral broader than deep. Frontal a little longer than broad, shorter than its distance from the end of the snout, and shorter than the parietals. Eye between four shields: a preocular, a supraocular, a postocular, and a subocular. Loreal longer than deep. One elongate anterior temporal, in contact with the postocular and the subocular. 5 upper labials. 3 lower labials in contact with the anterior chin shields, which are not longer than the posterior chin shields.
Dorsal scales smooth, without apical pits, in 19 rows. Ventrals 266–278; anal divided; subcaudals 56–64. Blackish above, with white transverse bands, which widen towards the abdomen. These bands are very narrow in the typical form, wider in the var. dayana, but constantly much narrower than the black interspaces. Some white spots on the head. Lower parts white, with greyish spots, which are continuations of the dorsal crossbands. These bands may form complete rings on the tail.
Total length 3 feet: tail 4 inches. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Singapore | 🇸🇬 Singapore |
Rare
Under 5% of wildlife watchers report a Cantor's Mangrove Snake sighting in Singapore on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 61st most-seen of the 64 reptiles we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Cantor's Mangrove Snake in Singapore on a given day, so our monthly data shows no clear season.
Only Singapore, in our data
Singapore is the only city on Wallace's Line with enough records to rate Cantor's Mangrove Snake sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Cantor's Mangrove Snake is recorded against all the reptiles logged in Singapore (5 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.
