By JuliusFajman - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=119420270
Sanger
Sources:
(*) https://en.wikipedia.org/wiki/Icterine_warbler
(*) https://ebird.org/species/ictwar1
(*) https://search.macaulaylibrary.org/catalog?taxonCode=ictwar1