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Location Bulgaria, Varna
Central coordinates 27o 22.72' East  43o 54.55' North
IBA criteria B2, B3, C6
Area 35,429 ha
Altitude 23 - 243m
Year of IBA assessment 2005

Bulgarian Society for the Protection of Birds

Site description An arid river valley with rocky massifs, covered by broadleaved forestand dry grassland on the ridges of the hills. Forests are dominated by Quercus, Carpinus and Acer.

Key Biodiversity The area is one of the most important breeding sites for Tadorna ferruginea and Buteo rufinus in the country. Gyps fulvus and Aquila chrysaetos used to breed in the area many years ago. Significant proportion (³1%) of national population breeding at site: Neophron percnopterus (1 pair), Circaetus gallicus (1 pair), Aquila pomarina (1 pair), Hieraaetus pennatus (1 pair), Bubo bubo (3 pairs).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Ruddy Shelduck Tadorna ferruginea breeding  1994  3 breeding pairs  good  B2, C6  Least Concern 
Levant Sparrowhawk Accipiter brevipes breeding  2005  2-6 breeding pairs  medium  B2, C6  Least Concern 
Lesser Spotted Eagle Clanga pomarina breeding  2004  9 breeding pairs  good  B2, C6  Least Concern 
Milvus migrans breeding  2004  1-3 breeding pairs  good  C6  Not Recognised 
Buteo rufinus resident  2004  9 breeding pairs  good  B2, C6  Not Recognised 
Corn Bunting Miliaria calandra breeding  1998  1,925-2,375 breeding pairs  good  B3  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Forest Broadleaved deciduous woodland  70%
Grassland Dry siliceous grassland  15%
Coastline Inland cliffs  5%
Artificial - terrestrial Arable land; Perennial crops, orchards and groves  10%

Land use

Land-use Extent (% of site)
agriculture 25%
forestry 70%
hunting 60%

Protection status National None International None

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Harsovska Reka. Downloaded from on 28/10/2016

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