This species is known only from the lowland, coastal plain of south-western and southern Cameroon and from Bioko Island in Equatorial Guinea.
Habitat and Ecology
It lives in lowland forest and mangrove forests, and can tolerate a limited degree of habitat disturbance. The males call in forest, often far from water, and guard a nest of eggs on large leaves a few centimetres above the ground. This species appears not to be water-dependent, and the larvae are presumably terrestrial.
It is a common species.
It is threatened by the loss of forest habitat due to agricultural development, logging and expanding human settlements.
It occurs in Korup National Park, and possibly in a few other protected areas.
Red List Status
Near Threatened (NT)
Listed as Near Threatened because its Extent of Occurrence is probably not much greater than 20,000 km2, and the extent and quality of its habitat is probably declining, thus making the species close to qualifying for Vulnerable.
Barej et al. (2010) considers Petropedetes darwinii occurring in Bioko Island (Equatorial Guinea) a synonym of Petropedetes johnstoni.
Jean-Louis Amiet 2004. Petropedetes johnstoni. The IUCN Red List of Threatened Species 2004: e.T58079A11714941. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T58079A11714941.en .Downloaded on 19 January 2019