Figure 1

Origin of samples (white circles) and recordings (triangles; black = own recordings by J.M.; grey = Xeno-canto recordings) of Buff-barred Warblers, Phylloscopus pulcher ; w = bird captured or recorded outside breeding season.
Origin of samples (white circles) and recordings (triangles; black = own recordings by J.M.; grey = Xeno-canto recordings) of Buff-barred Warblers, Phylloscopus pulcher ; w = bird captured or recorded outside breeding season.