CR
Javan Blue Flycatcher Cyornis banyumas



Family: Muscicapidae (Old World Flycatchers and Chats)

Authority: (Horsfield, 1821)

Red List Category

Criteria: A2bcd

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Justification of Red List category
This recently recognised species was formerly common across the island of Java, but demand for the Indonesian songbird trade has resulted in a precipitous decline over the past 20 years. The species is now confined to only a handful of localities, all of which are at risk of extirpation with trappers having proven their ability at other sites to remove all individuals from a locality in a short period of time. Remarkably, the population in captivity likely numbers in the tens of thousands, while the wild population is now suspected to number fewer than 1,000, and maybe much lower. Over the past ten years, the population is suspected of having declined by more than 80% and with demand for the species still high, there is a significant chance the species will become extinct in the near-future. For these reasons, it is listed as Critically Endangered.



Population size: 100-1000 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 59,000 km2

Country endemic: yes


Recommended citation
BirdLife International (2024) Species factsheet: Javan Blue Flycatcher Cyornis banyumas. Downloaded from https://datazone.birdlife.org/species/factsheet/javan-blue-flycatcher-cyornis-banyumas on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.