The black-naped oriole (Oriolus chinensis ) is a passerine bird in the oriole family that is found in many parts of Asia. There are several distinctive populations within the wide distribution range of this species and in the past the slender-billed oriole (Oriolus tenuirostris ) was included as a subspecies. Unlike the Indian golden oriole which only has a short and narrow eye-stripe, the black-naped oriole has the stripe broadening and joining at the back of the neck. Males and females are very similar although the wing lining of the female is more greenish. The bill is pink and is stouter than in the golden oriole.
The black-naped oriole is medium-sized and overall golden with a strong pinkish bill and a broad black mask and nape. The adult male has the central tail feathers tipped yellow and the lateral ones are more broadly yellow. The female has the mantle colour more greenish or olive. The juvenile has a streaked underside. The nestling has dull greenish with brown streaks. The head and nape are more yellowish and the undertail coverts are yellow. Several variations exist in the populations that have been separated as subspecies.
Subspecies diffusus breeds in eastern Siberia, Ussuriland, northeastern China, Korea, Japan and northern Vietnam and is widespread across India during winter, mainly in the northeastern parts and in the peninsular region and also found in Bangladesh. The population in the Andaman and Nicobar Islands are resident. In winter, populations breeding in eastern Asia spend the winter in the tropical areas of Southeast Asia such as Thailand and Myanmar. Subspecies diffusus is an uncommon migrant in many parts of South India and very rare migrant to Sri Lanka and are most regularly seen in the Western Ghats. In Singapore they are believed to have established as breeders only in the 1920s and are today common even within gardens in the city. In the 1880s they were considered rare. At the present time, orioles are fairly common in Singapore.
The black-naped oriole is found in forests, gardens and plantations. It feeds on berries and insects in the canopy.
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