This species is known from extreme southern Peninsular Thailand, peninsular Malaysia (and Sarawak) and Singapore to Indonesia (including Sumatra and Kalimantan), up to 150m asl. It is likely to occur a little more widely than current records suggest.
Habitat and Ecology
It inhabits shallow, gentle streams and nearby swampy areas including peat swamps, very flat alluvial forests (both primary forest and mature secondary growth), and overgrown plantations. The eggs are laid in sandy streambeds but no nest is constructed (Kiew 1984c).
It is generally not rare, but it is also not an abundant frog (Lim and Lim 1992); it is considered rare in Thailand.
The major threat to this species is deforestation. It is also collected for subsistence use and trade (Lim and Lim 1992; P. van Dijk pers. comm.), but most collection pressure is deflected from it by the sympatric occurrence of the larger and more common Limnonectes blythii.
It occurs in several protected areas, although more effective conservation of peat swamps and low alluvial rainforests is needed.
This species was previously hidden within the Limnonectes blythii-macrodon complex.
Peter Paul van Dijk, Djoko Iskandar, Robert Inger 2004. Limnonectes malesianus. In: IUCN 2013