First confirmed connectivity between breeding sites and wintering areas of the globally threatened Aquatic Warbler Acrocephalus paludicola

Knowledge of population-specific non-breeding areas in sub-Saharan Africa for the globally threatened Aquatic Warbler Acrocephalus paludicola is paramount for the implementation of successful conservation strategies that consider the species' entire annual range. This may be the case especially for declining marginal populations. Here we report on two Aquatic Warblers that were ringed in the Inner Niger Delta in Mali and in the region of the Djoudj National Park, Senegal. The first was recaptured in the Supoj mire, Ukraine, and the second observed in the Biebrza marshes in Poland. These records represent the first proof of connectivity between wintering areas and breeding sites for the species.