This species is endemic to the Central Hills of Sri Lanka at elevations of 1,555-2,135m asl. There are records from Agra Bopath and Horton Plains (Manamendra-Arachchi and Pethiyagoda 2005).
Habitat and Ecology
It inhabits both closed and open canopy habitats, including grasslands. Most sub-adults and juveniles were found in grassland and disturbed habitats, while mature males and larger females were usually found in closed-canopy habitats. Adults have been observed perched on branches 0.5-3.5m above ground (Manamendra-Arachchi and Pethiyagoda 2005). It breeds by direct development, and the eggs are deposited in humus.
Anslem de Silva (pers. comm.) reports that the population in the Horton Plains National Park may occur at a density of around 62,000 individuals per km², which suggests that the species is abundant where it occurs.
The major threats are habitat loss, through the commercial harvesting of timber (clear-cutting) and firewood collection, agrochemical pollution, and the desiccation of habitat through periods of drought. In Horton Plains National Park, forest fires and dieback of mature trees are also threats.
It has been recorded from Horton Plains National Park, Agra Bopath Forest Reserve and Hakgala Strict Nature 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 a single location, and there is continuing decline in the extent and quality of its habitat in the Central Hills of Sri Lanka.
This species is sometimes placed in the genus Rhacophorus.
Kelum Manamendra-Arachchi, Anslem de Silva, Deepthi Wickramasinghe 2004. Pseudophilautus microtympanum. The IUCN Red List of Threatened Species 2004: e.T58874A11851545. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T58874A11851545.en .Downloaded on 18 January 2019