Homalopsis buccata
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~70% in a week ~90%
Homalopsis buccata (puff-faced water snake or masked water snake) is a species of mildly venomous snake in the Homalopsidae family found in tropical areas of Southeast Asia. Upper labials 1–4 contact single loreal; two prefrontals; 33–40 dorsal scale rows at mid-body, usually reduced to fewer than 30 posteriorly; one postocular plus a postsubocular; 12 (11–14) upper labials; ventral count fewer than 166.
Homalopsis buccata has a banded pattern and usually reaches 1 meter (3 feet) in length. They have a somewhat similar body build to the anaconda, but instead of constriction they use a mild venom from a grooved rear fang to subdue prey.
H. buccata ranges from northern Sumatra to Salanga Island, Indonesia and Borneo; it is present on the Malaysian peninsula and in extreme southern Thailand (vicinity of Pattani). H. buccata are ovoviviparous, meaning they do not lay eggs but rather give birth to live young. Females give birth to 2-20 live young, with an average of 9.26 young per breeding. Studies have shown this species breeds year round, with a peak season of October–March (though no distinctive breeding season was found).
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gunung Leuser National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia | |
| 2 | Yogyakarta | 🇮🇩 Indonesia | |
| 3 | Bandung | 🇮🇩 Indonesia |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Prague Zoo | 🇨🇿 Czechia | |
| 2 | Toba Aquarium | 🇯🇵 Japan | |
| 3 | Siam Serpentarium | 🇹🇭 Thailand | |
| 4 | Snake Farm of Queen Saovabha Memorial Institute | 🇹🇭 Thailand | |
| 5 | Rákosův pavilon | 🇨🇿 Czechia | |
| 6 | Velemlokárium | 🇨🇿 Czechia | |
| 7 | AOAO Sapporo | 🇯🇵 Japan |
Possible
About 30% of wildlife watchers report a Banded Swamp Snake sighting in Jakarta on a given day, based on 61 verified sightings from GBIF citizen-science data. It is the 14th most-seen of the 47 reptiles we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
November
In that month about 50% of wildlife watchers report a Banded Swamp Snake in Jakarta on a given day, against under 5% in March and July, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Banded Swamp 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.
Yes
Of the 3 cities where we can rate Banded Swamp Snake sightings, Jakarta has the highest daily chance: about 30%. Next come Yogyakarta (Indonesia, about 20%) and Bandung (Indonesia, about 10%).
Same family: Homalopsidae
The closest relatives of the Banded Swamp Snake that you can see in Jakarta (family Homalopsidae, Mud Snakes) are Rainbow Mud Snake (about 20%) and Southeast Asian Bockadam (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Banded Swamp Snake is recorded against all the reptiles logged in Jakarta (61 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.
