Albania (B), Algeria (B), Andorra (B), Austria (B), Belgium (B), Benin (NB), Bosnia and Herzegovina (B), Bulgaria (B), Burkina Faso (NB), Cameroon (NB), Chad (NB), Côte dIvoire (NB), Croatia (Local Name: Hrvatska) (B), Cyprus (P), Egypt (P), France (B), Gambia (NB), Germany (B), Ghana (NB), Gibraltar, Greece (B) (P), Guinea (NB), Guinea-bissau (NB), Iran [Islamic Republic of] (P), Israel (P), Italy (B) (P), Jordan (B) (P), Latvia (B), Lebanon (B), Libyan Arab Jamahiriya (NB) (P), Liechtenstein (B), Macedonia [The Former Yugoslav Republic of] (B), Mali (NB), Malta (P), Mauritania (NB), Montenegro (B), Morocco (B), Netherlands Antilles (B), Niger (NB), Nigeria (NB), Poland (B), Portugal (B), Romania (B) (P), Saudi Arabia, Senegal (NB), Serbia (B), Slovenia (B), Spain (B), Sudan (NB), Switzerland (B), Syrian Arab Republic (P), Togo (NB), Tunisia (B), Turkey (B), Western Sahara.
Vagrant to Czech Republic, Denmark, Eritrea, Finland, Gabon, Hungary, Ireland, Norway, Oman, Sweden, Ukraine, United Arab Emirates, United Kingdom.
Unknown to Georgia.
Breeds in south-western and central Europe from Spain and northern Portugal east to Austria, Slovenia and Italy, and in north-western Africa from northern Morocco east to north-western Tunisia; non-breeding in western African Sahel zone from southern Mauritania and Senegal east to northern Nigeria, northern Cameroon and western Chad.
 
Population
Estimated population is 5,000,000 - 15,000,000 (2010).
Western Bonelli's Warbler (Phylloscopus bonelli) [XC671847]
by Javi from Arrondissement de Poitiers (near Quin\u00e7ay), Vienne, Nouvelle-Aquitaine, France (song)
Western Bonelli's Warbler (Phylloscopus bonelli) [XC695644]
by Santiago Caballero Carrera from Cuenca Alta del Manzanares (near Soto del Real), Madrid, Community of Madrid, Spain (song)
Subspecies
No subspecies.
Phylloscopus bonelli (Sibley and Monroe 1990, 1993) was split into Bonelli's Warbler (Phylloscopus bonelli) and Eastern Bonelli's Warbler (Phylloscopus orientalis) by AERC TAC (2003) (Sangster et al. 2002), but this treatment is not followed by the BirdLife Taxonomic Working Group, because although Sangster et al. (2002) argue that 'the calls of the allopatric bonelli and orientalis are completely diagnostic', Svensson (1999) state that in agitation both subspecies use the 'hü-if' call that is otherwise considered diagnostic of bonelli only. Given that the songs and morphology are very similar, and that the ranges of the two taxa show a close approach in Croatia, it seems wise at present to await further information from this region.
Was until recently treated as conspecific with Eastern Bonelli's Warbler (Phylloscopus orientalis), but the two differ in vocalizations (primarily in calls) and also exhibit small differences in mitochondrial DNA. Occasional hybridization with Wood Warbler (Phylloscopus sibilatrix) recorded.