This species occurs widely in Sumatra and Kalimantan, Indonesia. In Peninsular Malaysia, it is now restricted to three localities, the Tasek Bera wetland, north Selangor Peat Swamp and Muar Peat Swamp. The Sungei Buloh population on Peninsular Malaysia has disappeared. It probably occurs more widely on Sumatra and Borneo than current records suggest, especially in areas between known sites.
Habitat and Ecology
This species is found in peat swamps and swamp forest. It breeds in swamps by larval development. It is not found in modified habitats.
In Peninsular Malaysia it is common where it survives. The Sungei Buloh population, reported in the 19th Century, has now disappeared. In Sumatra the species is common in swamps, but in Kalimantan it is uncommon.
The major threats to this species are wetland drainage, pollution, and other forms of habitat degradation and destruction.
Improved protection and management of the peat swamp habitats and status surveys and other studies are desirable for this species.
Peter Paul van Dijk, Djoko Iskandar, Robert Inger 2004. Pseudobufo subasper. In: IUCN 2013