This species is known from the mountains of western Cameroon at 1,200-2,500m asl, where it occurs on Mount Manenguba, the Bamileke Plateau (at Djuttitsa, Batie and Bangwa), the Bamboutos Mountains, and Riboa (between the Adamawa and Mambilla Plateaus). It might occur more widely, and if Bufo djohongensis proves to be a synonym, then its range will extend to the east of the Adamawa Plateau.
Habitat and Ecology
It lives along fast-flowing streams in montane grassland, sometimes with forest strips, and hides in holes during the day. It breeds in slow-flowing streams bordered with trees.
It is not a well-known species, though it is probably moderately common in suitable habitats.
Although it can probably cope with some disruption to its habitat, it is probably suffering from continuing degradation of its montane habitats as a result of smallholder farming activities, livestock ranching, wood extraction, and human settlement.
It is not known to occur in any protected areas. Protection of the remaining highland forests in Cameroon, particularly Mount Manenguba, is urgently needed.
Red List Status
Listed as Endangered because its Extent of Occurrence is probably less than 5,000 km2, its distribution is severely fragmented, and the extent of its habitat on the Cameroonian mountains is declining.
It is possible that Sclerophrys djohongensis is a synonym of this species (J.-L. Amiet pers. comm.). However, this synonymy is not universally accepted (D. Blackburn pers. comm. August 2012).
This species was under the generic name Amietophrynus but is now treated under Sclerophrys (Frost 2016).
This is an amended assessment created to account for the change in generic name.
Jean-Louis Amiet, Mills Tandy 2016. Sclerophrys villiersi. The IUCN Red List of Threatened Species 2016: e.T54794A107351879. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T54794A107351879.en