There are two subspecies, the nominate race, which occurs on Luzon, Polillo, Mindoro, Sibuyan and Ticao, and A. c. nigriostris, which is found in Panay, Negros and Cebu.
The diocese extended over the provinces of Camarines and Albay as far as and including the islands of Ticao, Masbate, Burias and Catanduanes; the province of Tayabas as far as and including Lucban; and, in the contracosta of Mauban to Binangonan, Polo, Baler and Casiguran.
The Visayan Hornbill (Penelopides panini) is a hornbill found in rainforests on the islands of Panay, Negros, Masbate, and Guimaras, and formerly Ticao, in the Philippines.