Amaurornis isabellina
Silhouette: Sheatherius · PhyloPic
In 3 days ~60% in a week ~90%
The isabelline bush-hen (Amaurornis isabellina), also known as Sulawesi waterhen or isabelline waterhen, is a large, up to 40 cm long, rufous and brown rail. The term isabelline refers to the colouration. It is the largest member of the genus Amaurornis. Both sexes are similar with olive brown plumage, pale green bill, greenish brown legs and rufous below.
An Indonesian endemic, the isabelline waterhen is confined to grasslands near waters and lowlands of Sulawesi. The call is a loud "tak-tak-tak-tak". Widespread throughout its natural habitat, the isabelline waterhen is evaluated as least concern on the IUCN Red List of Threatened Species.
BirdLife Species Factsheet Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tangkoko Nature Reserve | 🇮🇩 Indonesia |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report an Isabelline Bush-hen sighting in Tangkoko Nature Reserve on a given day, based on 250 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 40th most-seen of the 138 birds we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
June and October
In those months about 40% of wildlife watchers report an Isabelline Bush-hen in Tangkoko Nature Reserve on a given day, against about 10% in January, the lowest month.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Isabelline Bush-hen sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Tangkoko Nature Reserve, in our data
Tangkoko Nature Reserve is the only park on Wallace's Line with enough records to rate Isabelline Bush-hen sightings: about 30% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Isabelline Bush-hen is recorded against all the birds logged in Tangkoko Nature Reserve (250 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.
