This species is restricted to the southern Western Ghats of India in Kerala (Agasthyamala Hills of the Neyar Wildlife Sanctuary and Munnar) and Tamil Nadu (Kalakad-Mundanthurai Tiger Reserve and Indira Gandhi National Park). It is reported from elevations of 900-1,400 m asl.
Habitat and Ecology
It is generally found along streams in montane tropical moist forest, and is not present in degraded habitats. An arboreal species, it may be found in both the canopy and understorey levels of the forest (3-5m above the ground). It breeds on vegetation overhanging streams, and the larvae develop in the streams.
It is a rare species and is difficult to locate.
The major threat is habitat loss following the conversion of forest to agricultural land (including tea plantations).
It has been recorded from Kalakad-Mundanthurai Tiger Reserve and Indira Gandhi National Park, both in Tamil Nadu, and Neyar Wildlife Sanctuary in Kerala. Recent investigations into the ecology and breeding biology of this species have been undertaken by S.D. Biju (1999-2001).
Red List Status
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2, its distribution is severely fragmented, and there is continuing decline in the extent and quality of its habitat.
Biju, S.D., Dasaramji Buddhe, G., Dutta, S., Vasudevan, K., Srinivasulu, C. & Vijayakumar, S.P. 2004. Rhacophorus calcadensis. The IUCN Red List of Threatened Species 2004: e.T58983A86241030. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T58983A11854267.en .Downloaded on 24 January 2019