Background
The aquatic warbler (Acrocephalus paludicola) is Europeâs rarest migratory songbird and a globally threatened species (listed as âvulnerableâ by the IUCN and included in Annex I of the EU Birds Directive). It has very specific habitat requirements, being found only on fen mires or wet meadows on peaty soil covered by sedges. The water lev ...