Javan Oriole Oriolus cruentus

Family: Oriolidae (Old World Orioles)

Authority: (Wagler, 1827)

Red List Category

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Justification of Red List category
This species is very poorly known and there are only a handful of modern records from two mountains in Java. However there are unconfirmed reports from widely separated additional sites and the species is noted to be highly inconspicuous. Plausible bounds of the population therefore range from a very small number of mature individuals that may be as few as 250 mature individuals to a large population that would exceed the population size threshold for listing as threatened or Near Threatened.

There is a slow rate of ongoing forest loss and degradation, such that a slow rate of decline is suspected. However, the species has also been recorded in domestic trade in Java, which represents an unquantified level of threat from which a continuing decline can be inferred.

As such, and with no information to judge current population size more accurately the species could be assessed within any category from Critically Endangered under C2a(ii) (if the population is restricted to the very small numbers from two adjacent sites suggested by confirmed records, coupled with a continuing decline inferred from the observed capture for trade) through to Least Concern (if the population is thinly spread throughout the whole of Java and therefore large, and any suspected rate of decline does not exceed or approach 30% in three generations).

As such, at present this elusive and poorly known species is assessed as Data Deficient. It is a high priority for further research.

Population size: unknown

Population trend: Decreasing

Extent of occurrence (breeding/resident): 1,400 km2

Country endemic: Yes

Recommended citation
BirdLife International (2023) Species factsheet: Oriolus cruentus. Downloaded from http://datazone.birdlife.org/species/factsheet/javan-oriole-oriolus-cruentus on 23/09/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 23/09/2023.