From the IUCN Red List Species Account:

Range Description

This species is known from Jozani Forest on Unguja Island (Zanzibar), Tanzania, and Arabuko-Sokoke Forest in coastal Kenya. It is likely to be found in other forested localities on the East African coast. Its extent of occurrence (EOO) is 3,361 km².

Habitat and Ecology

Both known sites are in coastal forest where it lives in forested habitats. It presumably breeds in water by larval development.

Population

This species appears to be abundant in Jozani Forest. However due to ongoing declines in the extent and quality of habitat, the population is suspected to be decreasing.

Population Trend

decreasing

Major Threats

The main threats are expanding agriculture and removal of timber, and this species is probably unable to adapt to loss of its forest habitat (Pickersgill, 2007).

Conservation Actions

Conservation Actions
It occurs in Arabuko-Sokoke National Park. Jozani Forest is within the Proposed Jozani-Chwaka Bay National Park. 

Conservation Needed
Both of these national parks need increased protection. 

Research Needed
Surveys are needed to determine whether or not this species is present in other areas.

Red List Status

Endangered (EN)

Rationale

Listed as Endangered because its extent of occurrence (EOO) is 3,361 km², all individuals occur in fewer than five threat-defined locations, and there is continuing decline in the extent and quality of its habitat.

Citation

IUCN SSC Amphibian Specialist Group 2016. Phrynobatrachus ungujae. The IUCN Red List of Threatened Species 2016: e.T135885A84397455. http://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T135885A84397455.en .Downloaded on 23 February 2019