This species is endemic to Ngezi Forest, on Pemba Island, in Tanzania. It occurs close to sea-level.
Habitat and Ecology
It appears to be dependent on lowland forest. At its only known site it was found calling in forest trees overhanging a small pool, but it was absent from the grasses and herbage at the other end of the same pool in a more open situation. It presumably breeds in water by larval development.
It appears to be a rare species. Only 10-20 males were heard calling at its only known site.
It is restricted to a tiny area where its forest habitat is at risk from harvesting of wood, and small-scale agriculture.
It occurs in the Ngezi Forest Reserve which requires careful management for this extremely rare species.
Red List Status
Critically Endangered (CR)
Listed as Critically Endangered because its extent of occurrence is less than 100 km² and its area of occupancy is less than 10 km², all individuals are in a single location, and there is a continuing decline in the extent and quality of its habitat on the island of Pemba.
Martin Pickersgill 2008. Hyperolius watsonae. The IUCN Red List of Threatened Species 2008: e.T135845A4210326. http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T135845A4210326.en .Downloaded on 24 February 2019