Results of a phylogeographical study indicate that the Sunda leopard cat lineage diverged in the Middle Pleistocene. The Borneo population is thought to have expanded to Sumatra and the Philippines island of Palawan after the Toba eruption, when these islands were connected during the late Pleistocene glaciation. Since leopard cats in Palawan and Negros show low genetic differentiation, it is possible that humans introduced the leopard cat from Palawan to Negros and adjacent islands.