This species is known with certainty only from the Nilgiri Hills of the southern Western Ghats of India. It is a highland species occurring up to 2,000m asl.
Habitat and Ecology
It is an arboreal species associated with tropical moist evergreen forest, although it can occur in modified areas. Breeding is by direct development.
It is commonly seen in the Nilgiri Hills (Bossuyt and Dubois 2001), but is believed to be declining.
The major threat is the conversion of native forest to intensively cultivated areas (including timber and non-timber plantations).
It has been recorded from the Nilgiri Biosphere Reserve. The species was recently included in field studies by Biju (1998-2001).
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 a continuing decline in the extent and quality of its forest habitat.
Specimens recorded from Ponmudi Hills (and possibly Wayanad) as Philautus signatus are in the process of being described as the new species Philautus sp. nov. 'Ponmudi_3' (S.D. Biju pers. comm.).
S.D. Biju, Gajanan Dasaramji Bhuddhe, Bexel Ayyasamy Daniel, Sushil Dutta, Karthikeyan Vasudevan 2004. Raorchestes signatus. The IUCN Red List of Threatened Species 2004: e.T58903A11852815. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T58903A11852815.en .Downloaded on 16 December 2018