This species is known from Thailand (Peninsular: Ranong, Surat Thani, Phangnga, Krabi, and around the boarder of Satun, Songkhal and Malaysian Kedah), Malaysia (Peninsular, Penang, Tioman, Sabah and Sarawak) (Taylor 1962, Berry 1975), Indonesia (Kalimantan) and Brunei Darussalam occurring below 700 m asl. It probably occurs more widely than current records suggest, especially in areas between known sites. Confusion between Rana signata and Rana picturata makes many old Bornean records suspect.
Habitat and Ecology
It is abundant in lowland forests, including swamp and heath forest, and is commonly found in the riparian vegetation along stream banks. Metamorphs disperse through the forest and when they are half grown they return to the stream banks. Tadpoles develop in quiet side-pools at the edge of streams.
It is generally a common species.
Deforestation is the principal threat to this species.
It is found in protected areas on the Malay Peninsular (e.g. Temengor Forest Reserve, Ulu Muda Forest Reserve, Pasoh Forest Reserve) and in Borneo (Sabah and Sarawak). Protection of lowland tropical forest is the main conservation measure required. The taxonomic status of this species is currently under investigation.
Red List Status
Least Concern (LC)
Listed as Least Concern in view of its wide distribution and presumed large population.
The highland frogs usually attributed to Hylarana signata might represent a separate taxon. The status of the Tioman population is likewise unclear. The species was transferred to Pulchrana by Oliver et al. (2015).
IUCN SSC Amphibian Specialist Group 2017. Pulchrana signata. The IUCN Red List of Threatened Species 2017: e.T58719A113812072. http://dx.doi.org/10.2305/IUCN.UK.2017-1.RLTS.T58719A113812072.en