Porphyrio indicus
Silhouette: Sheatherius · PhyloPic
In 3 days ~10% in a week ~20%
The black-backed swamphen (Porphyrio indicus) is a species of swamphen occurring from southeast Asia to Sulawesi and Borneo. It used to be considered a subspecies of the purple swamphen, which it resembles, but has a large shield, black upperparts, and the side of the head is blackish.
It tends to migrate away from urbanization and other human activity. It lives in wetlands, preferring those with slow-flowing water. Transactions of the Linnean Society of London 13: 194. Media related to Porphyrio indicus at Wikimedia Commons
Data related to Porphyrio indicus at Wikispecies Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia |
Rare
Under 5% of wildlife watchers report a Black-backed Swamphen sighting in Jakarta on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 82nd most-seen of the 138 birds 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.
August and September
In those months about 10% of wildlife watchers report a Black-backed Swamphen in Jakarta on a given day, against under 5% in October to July, the lowest months. Those are among Jakarta's driest months, with about 70 mm of rain a month against 370 mm in February.
Only Jakarta, in our data
Jakarta is the only city on Wallace's Line with enough records to rate Black-backed Swamphen sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Black-backed Swamphen is recorded against all the birds logged in Jakarta (30 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.
