The blue-wattled bulbul (Pycnonotus nieuwenhuisii) is a disputed songbird species of the bulbul family of passerine birds. The specific epithet commemorates Dutch explorer Anton Willem Nieuwenhuis. The bird is endemic to the islands of Borneo and Sumatra. Its natural habitat is subtropical or tropical moist lowland forests.
Taxonomy and systematics
The status of this rarely seen bird is not known, primarily because it is not clear whether it is in fact a distinct species, or a natural hybrid between the black-headed bulbul and the grey-bellied bulbul or other closely related bulbul. Alternate names for the blue-wattled bulbul include the Malayasian wattled bulbul, Nieuwenhuis's bulbul and wattled bulbul.
- P. n. inexspectatus - (Chasen, 1939): Found on Sumatra
- P. n. nieuwenhuisii - (Finsch, 1901): Found on Borneo
It may be threatened by habitat loss but is only known from two specimens collected in 1900 and 1937, and few observations. Five sightings of the blue-wattled bulbul were recorded in Batu Apoi Forest Reserve in 1992.
- BirdLife International (2017). "Pycnonotus nieuwenhuisii". The IUCN Red List of Threatened Species. IUCN. 2017: e.T22712705A110040705. doi:10.2305/IUCN.UK.2017-1.RLTS.T22712705A110040705.en. Retrieved 13 January 2018.
- "Bulbuls « IOC World Bird List". www.worldbirdnames.org. Retrieved 2017-03-28.
- Collar, N.J. (2014). "Blue-wattled Bulbul Pycnonotus nieuwenhuisii and Black-browed Babbler Malacocincla perspicillata: two Sundaic passerines in search of a life" (PDF). BirdingASIA. 21: 37–44.
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