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Location Turkey, Istanbul,Kirklareli
Central coordinates 28o 21.00' East  41o 25.00' North
IBA criteria A1, B2
Area 132,100 ha
Altitude 0 - 417m
Year of IBA assessment 2004

Doga Dernegi (Partner Designate)

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Red-breasted Goose Branta ruficollis winter  1995  90 individuals  poor  A1, B2  Vulnerable 
Ferruginous Duck Aythya nyroca breeding  2000  20 breeding pairs  poor  A1  Near Threatened 
Black Stork Ciconia nigra breeding  5-10 breeding pairs  B2  Least Concern 
Pygmy Cormorant Microcarbo pygmaeus passage  2000  32 individuals  poor  A1  Least Concern 
Pygmy Cormorant Microcarbo pygmaeus winter  2002  224 individuals  A1  Least Concern 
Whiskered Tern Chlidonias hybrida breeding  2000  45 breeding pairs  B2  Least Concern 

IBA Monitoring

2015 very high very unfavourable low
Medium - based upon reliable but incomplete / partially representative data

Natural system modifications dams & water management/use - abstraction of ground water (domestic use) likely in short term (within 4 years) whole area/population (>90%) very rapid to severe deterioration very high
Transportation and service corridors flight paths likely in long term (beyond 4 years) some of area/population (10-49%) slow but significant deterioration medium

Wetlands (inland)   0 0 moderate (70-90%) poor (40-69%) very unfavourable

Whole area of site (>90%) covered by appropriate conservation designation  No management planning has taken place  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Istanbul Catalca Cilingoz YHGS Wildlife Development Area 35,829 is identical to site 0  
Kırklareli Kasatura Basin Nature Protect Area 0 is identical to site 0  
Terkos Lake Wetlands of International Importance (Ramsar) 0 is identical to site 0  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland)   major

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

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