This species is known from isolated populations in the south-western region of Sri Lanka, and has been recorded at elevations of 200-1,100m asl. Specific records come from Haycock, Weddagala, Kitugala, Kosmulla, Pathanegala, Kadugannawa and Pussellawa.
Habitat and Ecology
It is a canopy species of lowland and montane tropical moist forest. Adults have been observed perched 0.3-2m above the ground on branches, mossy logs and sometimes on mossy rock surfaces (Manamendra-Arachchi and Pethiyagoda 2005). Breeding is by direct development.
It is locally abundant.
The major threat is habitat loss as a result of the conversion of forest habitat to cultivation (tea, cardamom and shifting cultivation) and urban areas, and the extraction of timber; agrochemical pollution is also a threat to this species.
It has been recorded in Kanneliya Forest Reserve, Haycock Forest Reserve, Gilimale-Eratne Forest Reserve and Knuckles Forest Reserve.
Red List Status
Listed as Endangered because its Extent of Occurrence is less than 5,000 km2, and its Area of Occupancy is less than 500 km2, all individuals are in fewer than five locations, and there is continuing decline in the extent and quality of its habitat in Sri Lanka.
We follow Bossuyt and Dubois (2001) in considering this species to be separate from Philautus microtympanum, and belonging to the genus Philautus, rather than Polypedates.
Kelum Manamendra-Arachchi, Anslem de Silva 2004. Pseudophilautus cavirostris. The IUCN Red List of Threatened Species 2004: e.T58828A11847097. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T58828A11847097.en .Downloaded on 19 January 2019