Green Frogs Return to Luxembourg

Sicona reintroduced green frogs to Luxembourg after populations declined due to wetland loss. Around 2010, only a few green frogs remained near one pond in eastern Luxembourg.

Sicona collected frog eggs from the Belgian Limburg region. They restored ponds to create suitable habitats for the frogs.

The project involved over ten years of monitoring the reintroduced population. Researchers listened for the frogs’ distinct calls—a light clicking followed by a high-pitched chorus—to track their progress. This indicates the frogs are breeding and establishing themselves in the restored wetlands.

The article notes the project’s success, but does not detail the current total frog population or the long-term sustainability of the reintroduced species. Sicona continues to observe the frogs and their environment.