Description
A small, compact Hyperolius frog (males 19–21 mm, females 23 mm) from south-western Côte d’Ivoire. Dorsum translucent green, sometimes with fine black points. Ventrum in both sexes translucent greyish white. Discs green. No canthal stripe. Pupil horizontal.

This species is very similar to H. fusciventris lamtoensis and H. wermuthi. It differs from the former by its translucent ventrum without traces of red marbling and the absence of dark lateral pigmentation. It differs from H. wermuthi by its white, not green ventral pigmentation, but should be compared critically with that species since the differences between them seem very small.

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Cote d'Ivoire

View distribution map in BerkeleyMapper.

Only known from southwestern Côte d’Ivoire (Ivory Coast), specifically in a few forest localities in Taï National Park.

Life History, Abundance, Activity, and Special Behaviors
The males call from leaves and twigs. The voice is a high, shrill insect-like sound, shorter and lower that that of H. f. lamtoensis. The voice is very similar or identical to that of H. wermuthi.

This species is uncommon (IUCN 2019).

Trends and Threats
Due to its small range, limited known occurrences, and ongoing degradation of habitat, the IUCN Redlist assessment is Endangered (IUCN 2019).

Possible reasons for amphibian decline

General habitat alteration and loss
Habitat modification from deforestation, or logging related activities
Intensified agriculture or grazing
Urbanization
Habitat fragmentation

Comments
This account was taken from "Treefrogs of Africa" by Arne Schiøtz with kind permission from Edition Chimaira publishers, Frankfurt am Main.

References

IUCN SSC Amphibian Specialist Group. 2019. Hyperolius nienokouensis. The IUCN Red List of Threatened Species 2019: e.T56169A16926487. https://dx.doi.org/10.2305/IUCN.UK.2019-1.RLTS.T56169A16926487.en. Downloaded on 21 August 2021. [link]

Schiøtz, A. (1999). Treefrogs of Africa. Edition Chimaira, Frankfurt am Main.

Species Account Citation: AmphibiaWeb 2021 Hyperolius nienokouensis: Niénokoué Reed Frog <https://amphibiaweb.org/species/5470> University of California, Berkeley, CA, USA. Accessed Jan 30, 2025.

Citation: AmphibiaWeb. 2025. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 30 Jan 2025.

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