Natalobatrachus bonebergi


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Natalobatrachus bonebergi
Species Authority: Hewitt & Methuen, 1912
Common Name(s):
English Boneberg's Frog, Natal Diving Frog

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(ii,iii) ver 3.1
Year Published: 2012
Date Assessed: 2010-10-13
Assessor(s): South African Frog Re-assessment Group (SA-FRoG) & IUCN SSC Amphibian Specialist Group,
Reviewer(s): Hillers, A. & Diesmos, A.C.
Contributor(s): Channing, A., Turner, A., de Villiers, A., Harvey, J., Tarrant, J., Measey, J., Tolley, K., Minter, L., du Preez, L., Burger, M., Cunningham, M. & Davies, S.
Facilitator/Compiler(s): Measey, J.
Listed as Endangered, in view that its area of occupancy is around 150 km2, its distribution is severely fragmented, and there is a continuing decline in the extent and quality of its habitat and area of occupancy.
2004 Endangered

Geographic Range [top]

Range Description: This species is restricted to south-eastern South Africa, where it ranges from Dwesa Nature Reserve in the Eastern Cape Province east to southern and central KwaZulu-Natal Province. Its Extent of Ocurrence (EOO) has been estimated as 15,000 km2, with an Area of Occupancy of approximately 1% of the EOO (150 km², and declining). It occurs in 9 locations, all between 50 and 900 m asl.
South Africa (Eastern Cape Province, KwaZulu-Natal)
Range Map: Click here to open the map viewer and explore range.

Population [top]


Little population information is available for this species. It is considered to be severely fragmented as 50% of individuals are in isolated patches and the distances between subpopulations are considered to be too great for dispersal within one generation.

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It lives in coastal forests and gallery forests, where it is usually found along streams, and does not survive in open areas. It breeds in streams, hanging its eggs above water on branches, and sometimes on rock faces. The larvae fall into the water where they develop.
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade:

There are no reports of this species being utilized.

Threats [top]

Major Threat(s): Much of the forest habitat of this species has been lost to sugar cane cultivation and other agriculture, woodcutting, afforestation and urbanization. It is also threatened by pollution and siltation of streams.

Conservation Actions [top]

Conservation Actions: A priority for conservation research is to estimate the population size of adults in subpopulations, as well as determining the cause of direct threats. Obtaining a memorandum of understanding with land owners is also of high priority. It occurs in several protected areas, including Umtamvuna Nature Reserve and Oribi Gorge Nature Reserve. However, additional habitat and waterway protection is required.

Citation: South African Frog Re-assessment Group (SA-FRoG) & IUCN SSC Amphibian Specialist Group, 2012. Natalobatrachus bonebergi. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 28 August 2015.
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