Olive-brown oriole has been split into the following species:
Orioles are colourful Old World passerine birds in the genus Oriolus, the namesake of the corvoidean family Oriolidae. They are not related to the New World orioles, which are icterids that belong to the superfamily Passeroidea.
The Eurasian golden oriole or simply golden oriole, is the only member of the Old World oriole family of passerine birds breeding in Northern Hemisphere temperate regions. It is a summer migrant in Europe and western Asia and spends the winter season in central and southern Africa.
The African golden oriole, or African oriole, is a member of the oriole family of passerine birds which is a resident breeder in Africa south of the Sahara desert.
The black-hooded oriole is a member of the oriole family of passerine birds and is a resident breeder in tropical southern Asia from India and Sri Lanka east to Indonesia.
The black-naped oriole 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 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 Isabela oriole is a species of the oriole family endemic to Luzon in the Philippines. The bird was presumed to be extinct for many years until its rediscovery in December 1993 near Diffun, Quirino, and in Mansarong, Baggao, Cagayan in September 1994. Additional sightings were made in 2004 near San Mariano, Isabela.
The black-headed oriole is a species of bird in the family Oriolidae. It is found in Africa and has a very striking appearance with a bright yellow body, contrasting black head and flesh-coloured beak.
The black-eared oriole, or Buru oriole, is a species of bird in the family Oriolidae. It is native to Buru island.
The western oriole, or western black-headed oriole, is a species of bird in the family Oriolidae that is native to Africa. The adult upperparts are yellow-olive, and the underparts are yellow in colour. It is rated as a species of least concern on the International Union for Conservation of Nature Red List of Endangered Species.
The green-headed oriole, or montane oriole, is a species of bird in the family Oriolidae. It is found in eastern Africa.
The São Tomé oriole, or great-billed oriole, is a species of bird in the family Oriolidae. The species was named by Gustav Hartlaub in 1857. It is endemic to the island of São Tomé. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.
The black-and-crimson oriole is a species of bird in the family Oriolidae.
The silver oriole is a species of bird in the family Oriolidae. It breeds in southern China and winters in mainland Southeast Asia.
The Ethiopian oriole is a species of bird in the family Oriolidae.
The mountain oriole, is a species of bird in the family Oriolidae. It is found in central and eastern Africa from eastern Democratic Republic of Congo to central Kenya and western Tanzania. Its natural habitats are subtropical or tropical moist montane forests.
The dusky-brown oriole is a species of bird in the family Oriolidae. It is endemic to North Maluku.
The Philippine oriole or grey-throated oriole, is a species of bird in the family Oriolidae. It is endemic to the Philippines.
The brown oriole is a species of bird in the family Oriolidae.
The dark-throated oriole is a species of bird in the family Oriolidae.
The Indian golden oriole is a species of oriole found in the Indian subcontinent and Central Asia. The species was formerly considered to be a subspecies of the Eurasian golden oriole, but is now considered a full species. Adults can be told apart from the Eurasian golden oriole by the black of the eye stripe extending behind the eye.