CRCritically Endangered

Thomasset's Frog

Sooglossus thomasseti

Unknown

Overview

Thomasset's Seychelles frog or Thomasset's frog is a species of frog in the family Sooglossidae. It is endemic to Seychelles. There are two known populations: one on Silhouette Island and one on Mahé Island.

Sooglossus thomasseti faces severe threats from habitat destruction as its restricted montane forest habitat on Silhouette Island is cleared for development and agriculture. The species' extremely limited range makes it particularly vulnerable to invasive plant species that alter the forest understory where it breeds and forages. Climate change poses an additional threat by potentially shifting the optimal temperature and humidity conditions required for this endemic frog's survival in its high-elevation refugia.
Threat summary

Habitat

This endemic frog inhabits the montane mist forests of Silhouette Island in the Seychelles, typically found in leaf litter and low vegetation at elevations above 400 meters. The species requires the humid microclimate and dense canopy cover of these high-elevation forests for breeding and maintaining the moisture levels essential for its survival.

Rocky areas· major

Conservation measures underway

Species recovery

Other threatened species in SOOGLOSSIDAE

Seychelles Palm Frog

Sechellophryne pipilodryas

Declining

Gardiner's Seychelles Frog

Sechellophryne gardineri

Declining

Seychelles Frog

Sooglossus sechellensis

Declining

Threatened in Seychelles

Acropora mossambica

Declining

Imperturbatia violescens

Stable

Aldabra Fody

Foudia aldabrana

Increasing

Ariadna ustulata

Declining

Frequently asked questions

Why is Thomasset's Frog classified as Critically Endangered?

Thomasset's Frog is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Sooglossus thomasseti faces severe threats from habitat destruction as its restricted montane forest habitat on Silhouette Island is cleared for development and agriculture. The species' extremely limited range makes it particularly vulnerable to invasive plant species that alter the forest understory where it breeds and forages. Climate change poses an additional threat by potentially shifting the optimal temperature and humidity conditions required for this endemic frog's survival in its high-elevation refugia.

Where does Thomasset's Frog live?

Thomasset's Frog occurs in Seychelles. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.

What are the main threats to Thomasset's Frog?

The main threats to Thomasset's Frog are 11.1, 2.1, 5.3, and 5.4. The full IUCN-classified threat record for this species is detailed on the species page.

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