The Dayak fruit bat or dyak fruit bat (Dyacopterus spadiceus) is a species of megabat found only on the Sunda Shelf of southeast Asia, specifically the Malay Peninsula south of the Isthmus of Kra, and the islands of Borneo and Sumatra. Few specimens of any of the three species exist, due not only to their rarity, but also because they rarely enter the subcanopy of the forest where they can be caught in scientists' nets.