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Location Turkey, Istanbul
Central coordinates 29o 7.00' East  41o 7.00' North
IBA criteria A4i, A4ii, A4iii, A4iv, B1i, B1ii, B1iv
Area 55,240 ha
Altitude 0 - 409m
Year of IBA assessment 2004

Doga Dernegi (Partner Designate)



Site description The Boðaziçi strait runs north-south for c.33 km, and is c.1.5 km wide. The site includes the forested areas east (Polonezköy Nature Park) and west (Belgrade forest) of the strait, which are known to be of importance to roosting migrants. It does not include the çamlýca hills and the islands in the Sea of Marmara, which would qualify as an IBA in their own right due to the large numbers of migrants passing over, but which provide limited scope for bird conservation.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Yelkouan Shearwater Puffinus yelkouan non-breeding  2000  1,000-25,000 individuals  medium  A4ii, B1ii  Vulnerable 
Yelkouan Shearwater Puffinus yelkouan winter  1,377 individuals  A4ii, B1ii  Vulnerable 
Black Stork Ciconia nigra passage  8,000 individuals  A4i, B1i  Least Concern 
White Stork Ciconia ciconia passage  32,000-338,353 individuals  A4i, B1i  Least Concern 
Great Cormorant Phalacrocorax carbo winter  3,456-10,000 individuals  A4i, B1i  Least Concern 
European Shag Phalacrocorax aristotelis resident  2002  450 individuals  B1i  Least Concern 
Larus michahellis winter  1999  40,000 individuals  A4i, B1i  Not Recognised 
Black-headed Gull Larus ridibundus winter  1999  15,040 individuals  B1i  Least Concern 
Mediterranean Gull Larus melanocephalus passage  2000  14,500 individuals  A4i, B1i  Least Concern 
A4iii Species group - waterbirds winter  20,310-22,644 individuals  A4iii   
A4iv Species group - soaring birds/cranes passage  92,000 individuals  A4iv, B1iv   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bogazici SIT (Law on Protection of Cultural and Natural Assets No. 2863) 0 protected area contained by site 0  
Polonezköy Nature Park 3,004 protected area contained by site 2,931  
Sariyer Game Reserve 2,338 protected area contained by site 1,451  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Mixed woodland  30%
Sea Sea inlets and coastal features  10%
Artificial - terrestrial Other urban and industrial areas  60%

Land use

Land-use Extent (% of site)
agriculture 5%
urban/industrial/transport 60%
tourism/recreation 20%
military 5%
forestry 15%

Protection status National Partial International None3,006 ha of IBA covered by Nature Park (Polonezköy, 3,006 ha). 2,338 ha of IBA covered by Permanent Wildlife Reserve (Sarýyer, 2,338 ha). 5,296 ha of IBA covered by Preservation Forest (Belgrad Ormaný, 5,296 ha). IBA also overlaps with SÝT (Boðaziçi).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Bosphorus. Downloaded from http://www.birdlife.org on 22/08/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife