Fowlea melanzostus
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~30% in a week ~50%
Fowlea melanzosta, also commonly known as the Javan keelback water snake and the Javanese keelback water snake, is a species of snake in the family Colubridae. The species is endemic to Indonesia. F. melanzosta is found in Java and Bali, Indonesia.
F. melanzosta is a common species typically encountered in rice paddies, but it also occurs near lakes, rivers, streams, marshes, and in grassland. F. melanzosta is oviparous. Gravenhorst JLC (1807). Vergleichende Übersicht des Linneischen und einiger neueren zoologischen Systeme, nebst dem eingeschalteten Verseichnisse der zoologischen Sammlung des Verfassers und den Beschreibungen neuer Thierarten, die in derselben vorhanden sind. Göttingen: Heinrich Dietrich. i–xvi + 476 pp. (Coluber melanzostus, new species, p. 402). (in German).
Manthey U, Grossmann W (1997). Amphibien und Reptilien Südostasiens. Münster: Natur und Tier Verlag. 512 pp. ISBN 978-3931587123. (Xenochrophus flavipunctatus melanozostus). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia |
With luck
About 10% of wildlife watchers report a Javan Keelback sighting in Jakarta on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 40th most-seen of the 47 reptiles we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
June and July
In those months about 20% of wildlife watchers report a Javan Keelback in Jakarta on a given day, against under 5% in February, May and August–November, the lowest months. Those are among Jakarta's driest months, with about 90 mm of rain a month against 370 mm in February.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Javan Keelback sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Only Jakarta, in our data
Jakarta is the only city on Wallace's Line with enough records to rate Javan Keelback sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Colubridae
The closest relatives of the Javan Keelback that you can see in Jakarta (family Colubridae, Colubrid Snakes) are Oriental Whipsnake (about 60%), Common Bronze-back (about 40%) and Common Wolf Snake (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Javan Keelback is recorded against all the reptiles logged in Jakarta (8 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.
