Nonbreeding sites of the tracked great reed warblers with the quartiles in longitude and latitude from Intra-tropical movements as a beneficial strategy for Palearctic migratory birds

Figure S1. Nonbreeding sites of 29 great reed warblers from central European population and 17 birds from south-eastern European population. Individual positions are expressed as the centres of the highest density distributions of daily positions (modes; filled circles) and the 1st and 3rd quartiles in longitude and latitude (lengths of crossing vertical and horizontal bars).