The 'Central Balkan' Important Bird Area (IBA) covers a total area of 166,678.21 hectares and includes not only the 'Central Balkan' National Park, but also the 'Bulgarka' Nature Park and several smaller protected territories.Some 151 species of birds have been recorded breeding in the 'Central Balkan' Important Bird Area, of which 56 species are designated by BirdLife International as being of European conservation concern (SPEC). These include: 4 species of bird classified as SPEC 1 (species of global conservation concern), 21 species of bird classified as SPEC 2 (species with global populations concentrated in Europe and having an unfavourable conservation status in Europe) and 31 species of birds classified as SPEC 3 (species with global populations concentrated outside Europe but having an unfavourable conservation status in Europe).
