The Javan blue flycatcher (''Cyornis banyumas'') is a species of

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

in the family

Muscicapidae The Old World flycatchers are a large family, the Muscicapidae, of small passerine birds restricted to the Old World (Europe, Africa and Asia), with the exception of several vagrants and two species, bluethroat (''Luscinia svecica'') and north ...

. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to the Indonesian islands of

Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...

and

Panaitan Panaitan (Prinsen, or Prince's Island; sometimes also Princess Island) (1450 m) is an island in the Sunda Strait, between Java and Sumatra, and in the Indonesian province of Banten. It is the largest island in the strait, and is located near the ...

. The Dayak blue flycatcher (''Cyornis montanus'') of

Borneo Borneo () is the List of islands by area, third-largest island in the world, with an area of , and population of 23,053,723 (2020 national censuses). Situated at the geographic centre of Maritime Southeast Asia, it is one of the Greater Sunda ...

, which was formerly considered conspecific, was split as a distinct species by the

IOC The International Olympic Committee (IOC; , CIO) is the international, non-governmental, sports governing body of the modern Olympic Games. Founded in 1894 by Pierre de Coubertin and Demetrios Vikelas, it is based in L ...

in 2021. It is typically solitary or spends time in pairs.

References

Javan blue flycatcher The Javan blue flycatcher (''Cyornis banyumas'') is a species of bird in the family Muscicapidae. It is endemic to the Indonesian islands of Java and Panaitan. The Dayak blue flycatcher (''Cyornis montanus'') of Borneo, which was formerly consid ...

Taxa named by Thomas Horsfield Endemic birds of Java {{Muscicapidae-stub