The Blue-wattled Bulbul (Pycnonotus nieuwenhuisii) is a disputed songbird

Songbird

A songbird is a bird belonging to the suborder Passeri of the perching birds . Another name that is sometimes seen as scientific or vernacular name is Oscines, from Latin oscen, "a songbird"...

 species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 in the family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 Pycnonotidae. The specific epithet commemorates Dutch explorer Anton Willem Nieuwenhuis

Anton Willem Nieuwenhuis

Anton Willem Nieuwenhuis was a Dutch explorer who travelled extensively in central Borneo in the 1890s, recording valuable ethnographic information about the Dayak people and making biological collections....

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It is found in Brunei

Brunei

Brunei , officially the State of Brunei Darussalam or the Nation of Brunei, the Abode of Peace , is a sovereign state located on the north coast of the island of Borneo, in Southeast Asia...

 and Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. Its natural habitat

Habitat

* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...

 is subtropical or tropical moist lowland forest

Forest

A forest, also referred to as a wood or the woods, is an area with a high density of trees. As with cities, depending where you are in the world, what is considered a forest may vary significantly in size and have various classification according to how and what of the forest is composed...

s.

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

Black-headed Bulbul

The Black-headed Bulbul is a member of the bulbul family of passerine birds. It is found in forests in south-east Asia. It has a mainly olive-yellow plumage with a glossy bluish-black head. A grey morph where most of the olive-yellow is replaced by grey also exists...

 (P. atriceps) and the Grey-bellied Bulbul

Grey-bellied Bulbul

The Grey-bellied Bulbul is a species of songbird in the Pycnonotidae family.It is found in Brunei, Indonesia, Malaysia, Burma, Singapore, and Thailand.Its natural habitat is subtropical or tropical moist lowland forests....

 (P. cyaniventris) or other Pycnonotus

Pycnonotus

Pycnonotus is a genus of songbird in the Pycnonotidae family.It contains the following species:* Sooty-headed Bulbul * Orange-spotted Bulbul * Streak-eared Bulbul...

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