The white-bellied woodpecker or great black woodpecker (Dryocopus javensis) is found in evergreen forests of tropical Asia, including the Indian subcontinent and Southeast Asia. It has 14 subspecies, part of a complex including the Andaman woodpecker (Dryocopus hodgei) (earlier treated as a subspecies). Many of its island forms are endangered, and some are extinct. Populations differ in the distribution and extent of white. They are among the largest of the Asiatic woodpeckers and nest in large dead trees, often beside rivers. Their drums and calls are louder than those of the smaller woodpeckers. Description This species is one of the largest living species of woodpecker. Adults range in size from and are behind only to the great slaty woodpecker and black woodpecker in size among Asian woodpecker species. The species is considered closely related to the more northern black woodpecker and the North American pileated woodpecker and is similar in size to these species. Body mass can vary from . Among standard measurements, the wing chord is , the tail is , the bill is and the tarsus is . The subspecies hodgsonii has whitish underwing coverts and a white rump. The face lacks white, but juveniles of the nominate race can have white streaks on the throat. Differences from the other Southeast Asian subspecies in the vocalizations and morphology of this species are suggested to be large enough to raise this to full species status. Solitary adults may spend an hour foraging at a suitable tree. The subspecies hodgsonii of India breeds from January to May, mainly in large dead trees, often using the same tree year after year. The normal clutch is usually of two eggs. They feed mainly on insects such as ants or grubs obtained mainly from under bark, but sometimes take fruit. Although shy, they can nest close to well-used tracks and human disturbed areas. They have a range of calls from a short, sharp to more intoned , , calls. The longer calls are given prior to flying off. They roost within holes. Subspecies Fourteen subspecies have been described: D. j. javensis (Horsfield, 1821) (southern Thailand to Borneo) D. j. philippinensis (Steere, 1890) (the Philippines; more often subsumed into the nominate subspecies) D. j. cebuensis Kennedy, 1987 (Cebu Island); not seen since the 1950s and likely extinct D. j. confusus (Stresemann, 1913) (Luzon; includes esthloterus (Parkes, 1971)) D. j. feddeni (Blyth, 1863) (Thailand, Laos