By Acrocephalus_scirpaceus_- Acrocephalus_scirpaceus_Vlaskop.jpg, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=10762567
Sanger
Sources:
(*) https://ebird.org/species/eurwar1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=eurwar1