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Location Turkey, Bursa
Central coordinates 28o 29.00' East  40o 23.00' North
IBA criteria A1, A4i, A4iii, B1i, B2
Area 6,971 ha
Altitude 0 - 20m
Year of IBA assessment 2004

Doga Dernegi (Partner Designate)

Site description A complex of coastal lakes, marshes and forests on the southern shores of the Sea of Marmara, where the Kocaçay river enters the sea. The western half of the delta comprises two lagoons, reedbeds (Phragmites), extensive Fraxinus, Alnus and Salix alluvial forest, and a wide dune strip. The eastern half is more open with one large lagoon, arable land, orchards, dunes, reedbeds and Salicornia- and Tamarix-covered mudflats. Human activities include cattle-grazing.

Key Biodiversity This site is important for breeding, wintering and passage waterbirds. Several species of woodpecker also breed. Breeding species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (one of the few confirmed Turkish sites).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Ferruginous Duck Aythya nyroca breeding  70 breeding pairs  A1, B2  Near Threatened 
Black Stork Ciconia nigra breeding  10 breeding pairs  B2  Least Concern 
Great White Pelican Pelecanus onocrotalus passage  800 individuals  A4i, B1i  Least Concern 
Pygmy Cormorant Microcarbo pygmaeus passage  1994  63-150 individuals  A1  Least Concern 
Common Coot Fulica atra winter  1996  42,610 individuals  A4i, B1i  Least Concern 
Charadrius alexandrinus breeding  70-90 breeding pairs  B2  Not Recognised 
Collared Pratincole Glareola pratincola breeding  80 breeding pairs  B1i, B2  Least Concern 
A4iii Species group - waterbirds winter  27,986-46,291 individuals  A4iii   

IBA Monitoring

2013 medium very unfavourable negligible
Medium - based upon reliable but incomplete / partially representative data

Energy production and mining mining and quarrying happening now some of area/population (10-49%) slow but significant deterioration medium
Pollution domestic & urban waste water - sewage happening now some of area/population (10-49%) slow but significant deterioration medium
Residential and commercial development tourism and recreation areas happening now some of area/population (10-49%) slow but significant deterioration medium

Microcarbo pygmaeus Pygmy Cormorant 33 21 - 64 unfavourable
Fulica atra Common Coot 42610 466 - 2 very unfavourable

Little/none of site covered (<10%)  No management planning has taken place  Very little or no conservation action taking place  negligible 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bursa Karacabey Karadagi - Ovakorusu YHGS Wildlife Development Area 28,611 protected area overlaps with site 0  
Kocaçay Delta Wetlands of International Importance (Ramsar) 0 is identical to site 0  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest  40%
Wetlands (inland) Water fringe vegetation  -
Artificial - terrestrial Arable land  15%
Coastline Lagoons; Sand dunes & beaches  -

Land use

Land-use Extent (% of site)
agriculture 15%
fisheries/aquaculture 10%
forestry 5%
hunting 5%
tourism/recreation 5%
not utilised 60%

Protection status National None International None

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Kocaçay Delta. Downloaded from on 25/10/2016

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