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70. Alexteroon jynx

Alexteroon jynx


Alexteroon Jynx is a species of frog that is endemic to Cameroon.

It is associated with narrow streams in forests, but information on its population status is not available. The species is listed as Critically Endangered because all of the individuals are in a single location and the area in which the species occupies is less than 10km². The species has an incredible reproductive behaviour whereby eggs are laid in a group on a leaf, which hangs above a stream. When tadpoles are ready to emerge, they escape the egg and fall from a height into the stream. The tadpoles then continue their development in the stream. This species is under threat due to the severe forest loss taking place in the Rumpi Hills due to smallholder farming activities, logging for wood and the impacts of human settlement and activity. It is unknown whether this species occurs in any protected areas, though it might well occur in the Rumpi Hills Forest Reserve; habitat protection is a matter of urgent priority for this species. Survey work is also required to determine the current population status of this species and limits of its range.

  • Order: Anura
  • Family: Hyperoliidae
  • Population: Unknown
  • Trend: decreasing
  • Size: 23-24.5mm

EDGE Score

EDGE Score: 5.97 (?)
ED Score: 23.41 (?)
GE / IUCN Red List (?)
Not Evaluated Data Deficient Least Concern Near Threatened Vulnerable Endangered Critically Endangered Extinct in the Wild Extinct


This species is known only from two localities at 800-1,050 metres above sea level near the villages of Betenge and Mofako on the eastern slopes of the Rumpi Hills, southwestern Cameroon.

Habitat and Ecology

This species is associated with narrow streams in forests, over which there is a continuous canopy. This species favours well aerated, flowing water, but avoids torrents. Males call close to streams in dense vegetation.

Find out more

This wordcloud illustrates the threats facing this species. The size of each word indicates the extent of a species range that is affected by that threat (larger size means a greater area is affected). The colour of the word indicates how much that threat impacts the species (darker shades of red mean the threat is more severe).

Urban development Crops Logging

Threat wordcloud key:

Small area affected
Large area affected
Least severe
Most severe
Severity unknown
Source: The IUCN List of Threatened Species. Version 2017.1.
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