This species is known from 1,280–2,050 m Asl (Dubois and Ohler 2005) from northwestern Thailand, northwestern Viet Nam, southern China (Yunnan Province) (Dubois and Ohler 2005: as Chaparana aenea), and northeastern Lao PDR (Teynié et al. 2014). These are unlikely to represent the actual limits of the species' range as similar habitat and elevations to those in its known localities occur throughout this part of Southeast Asia, from Shan and Kayah States in Myanmar to Lao Cai and Yen Bai Provinces in Viet Nam. Further surveys in these areas may uncover its presence there, therefore its range has been projected beyond known sites to include these areas of suitable habitat. The species' EOO is 408,943 km2, which represents 24 threat-defined locations.
Habitat and Ecology
Little is known about this species' life history, ecology and habitat use, except that it occurs in montane forest (Dubois and Ohler 2005) and breeds in the slow-flowing sections of forest streams (Teynié et al. 2014). The species likely has free-living larvae as are known in other Nanorana species.
Little is known about the size and trends of this species' population except that it has been detected in a number of surveys since the 1920s (Dubois and Ohler 2005, Teynié et al. 2014, J. Rowley unpubl. data), and was described as considerably less abundant than other Dicroglossid species in Hoang Lien National Park (J. Rowley pers. comm. October 2015). Forest loss associated with expanding agriculture throughout parts of the species range (Hongmei et al. 2007, Sodhi et al. 2009) is likely causing some declines in this species' population.
Forest loss is ongoing throughout Myanmar, Thailand, Lao PDR and Viet Nam, with natural forest rapidly being replaced with agriculture (Sodhi et al. 2009). Forest loss is also a threat in southwestern China, particularly due to demand for rubber (Hongmei et al. 2007). Recent satellite imagery shows areas of land cleared for agriculture throughout this species' range.
This species is known from a number of protected areas including Doi Chang and Doi Inthanon National Parks in Thailand, Huang Lian Shan Nature Reserve in China, Pu Hoat Proposed Nature Reserve, and Hoang Lien National Park (Dubois and Ohler 2005) in Viet Nam. Its predicted range occupies an extensive network of other protected areas across Thailand, Myanmar, Lao PDR, Viet Nam and China.
Addressing the lack of data is the first step towards ensuring this species' long-term persistence; further research on its threats, rates of harvest, life history and abundance would inform conservation decisions.
Red List Status
Least Concern (LC)
Listed as Least Concern as this species is relatively widespread; it has an extent of occurrence (EOO) of 408,943 km2, which consists of 24 threat-defined locations.
Nanorana fansipani has been synonymized under this species by Dubois and Ohler (2005).
IUCN SSC Amphibian Specialist Group 2017. Nanorana aenea. The IUCN Red List of Threatened Species 2017: e.T88370789A113958590. http://dx.doi.org/10.2305/IUCN.UK.2017-2.RLTS.T88370789A113958590.en .Downloaded on 19 January 2019