The hantu dodong of India feeds off the blood of wild pigs as well as the blood of humans, like many vampires do. However, this vampire comes into existence in a rather unique way — the evils of humanity give it form and allow it to physically manifest. Once it has a form, when not living in its cave, it hunts for its prey.

Source: Christen, Clowns and Tricksters, 44-45; Dennys, Descriptive Dictionary, 151; Skeat, Pagan Races of the Malay Peninsula, 323