The Isabelline Waterhen, Amaurornis isabellina also known as Sulawesi Waterhen or Isabelline Bush-hen is a large, up to 40cm long, rufous and brown rail. 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.

 This Gruiformes-related article is a stub. You can help Wikipedia by expanding it.