Breeds north, eastern and southern Spain, also north-western Africa in Western Sahara, much of Morocco, and eastern along coastal range and northern mountains in Algeria and Tunisia (south to southern slopes of Atlas) apparently to coastal north-western Libya;non-breeding western Africa.
 
Population
Estimated population is unknown (2010).
Western Olivaceous Warbler (Iduna opaca) [XC896711]
by id from Bah's Place, Kuloro, Kombo, Gambia (song)
Subspecies
No subspecies.
Hippolais pallida (Sibley and Monroe 1990, 1993) has been split into Olivaceous Warbler (Iduna pallida) and Isabelline Warbler (Iduna opaca) following Ottosson et al. (2005).