Ptychadena grandisonae
Grandison's ridged frog
family: Ptychadenidae
Conservation Status (definitions)
IUCN (Red List) Status Least Concern (LC)
Other International Status None
National Status None
Regional Status None

Country distribution from AmphibiaWeb's database: Angola, Congo, the Democratic Republic of the, Rwanda, Tanzania, United Republic of, Zambia


View distribution map using BerkeleyMapper.


From the IUCN Red List Species Account:


Range Description

This species ranges from southwestern Angola, through western and northern Zambia and southern and eastern Democratic Republic of Congo to Rwanda and the Udzungwa Mountains in southeastern Tanzania. It is presumed to occur in Burundi, and this is included in the species' distribution on the map, however there do not appear to be any records from this country. It appears to be mainly an upland species, and it occurs up to 1,900 m asl in Tanzania, and probably higher elsewhere. Records from Cameroon refer to Ptychadena straeleni.

Habitat and Ecology

It is a species of moist upland savannah and montane grassland. Its adaptability to modified habitats is not known. It has been found in grassland bogs, and the males call from flooded grassland, where it presumably breeds.


It is believed to be a common species.

Population Trend


Major Threats

It is widely distributed in a region of low human impact, and so it is unlikely to be significantly threatened, except in local situations.

Conservation Actions

It presumably occurs in many protected areas, and it is certainly present in Upemba National Park (Democratic Republic of Congo).

Red List Status

Least Concern (LC)


Listed as Least Concern in view of its wide distribution and its presumed large population.


IUCN SSC Amphibian Specialist Group 2013. Ptychadena grandisonae. The IUCN Red List of Threatened Species 2013: e.T58502A18399840. .Downloaded on 21 January 2019


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