The Black oriole (Oriolus hosii), is a species of Old World oriole in the Oriolidae family. It is endemic to the island of Borneo. One of the least known of the orioles, its distribution range is restricted to Sarawak in Borneo. Along with Oriolus cruentus, Oriolus trailli and Oriolus mellianus it belongs to a clade of red and black orioles. The binomial name is after Charles Hose who collected the first specimen of the species on Mount Dulit. Its natural habitat is subtropical or tropical moist montane forests where it is threatened by habitat loss.