The Bunun (Chinese: 布農; pinyin: Bùnóng), also historically known as the Vonum, are a tribe of Taiwanese aborigines and are best known for their sophisticated polyphonic vocal music. They speak the Bunun language. Unlike other aboriginal tribes in Taiwan, the Bunun are widely dispersed across the island, though their ancestral home is in Laipunuk. In the year 2000, the Bunun numbered 41,038. This was approximately 10% of Taiwan's total indigenous population, making them the fourth-largest tribal group. They have five distinct sub-tribes: the Takbunuaz, the Takituduh, the Takibaka, the Takivatan, and the Isbukun.