This species is known only from montane regions (750–2,200 m asl) of western Sabah, northern Sarawak and northeastern Kalimantan, all in Borneo.
Habitat and Ecology
It is an inhabitant of sub-montane forests (oak-chestnut and mossy forest) and montane forests, where adults are found in the leaf-litter and on vegetation close to streams (Malkmus et al. 2002). It is unable to adapt to any type of habitat disturbance (P. Yambun pers. comm. January 2018). Breeding occurs in small, clear, rocky, mountain streams. Tadpoles hatch and hide in the crevices of the gravel stream bed.
It appears to be relatively abundant. Due to ongoing decline in the extent and quality of habitat, the population is suspected to be decreasing.
The subpopulation in Sarawak is within Gunung Mulu National Park, which is well protected and not threatened at present (Y.M. Pui and I. Das pers. comm. March 2018). In Sabah, Crocker Range and Kinabalu National Parks are well-protected and well-managed protected areas, as well as the peak of Trus Madi where no logging is occurring (P. Yambun pers. comm. January 2018). Other parts of the range are threatened by forest clearance for pine and eucalyptus plantations, pollution, and the subpopulation in Ulu Padas in Sabah is threatened by a logging concession (I. Das pers. comm. March 2018).
This species occurs in Gunung Mulu, Crocker Range, and Kinabalu National Parks in Malaysia, which are well-protected and well-managed. It also occurs in Kayan Mentarang National Park in Kalimantan.
There remains a need for improved protection and maintenance of submontane forest in Kalimantan, Indonesia.
Further research on this species' distribution, population status, and threats.
Red List Status
Listed as Least Concern in view of its relatively wide distribution and presumed large population.
IUCN SSC Amphibian Specialist Group 2018. Leptobrachella baluensis. The IUCN Red List of Threatened Species 2018: e.T57542A114918019. http://dx.doi.org/10.2305/IUCN.UK.2018-2.RLTS.T57542A114918019.en .Downloaded on 16 January 2019