• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population at site	IBA criteria triggered
Red-breasted Goose Branta ruficollis	VU	winter	1995	90 individuals	A1, B2
Ferruginous Duck Aythya nyroca	NT	breeding	2000	20 breeding pairs	A1
Black Stork Ciconia nigra	LC	breeding	-	5-10 breeding pairs	B2
Pygmy Cormorant Microcarbo pygmaeus	LC	passage	2000	32 individuals	A1
Pygmy Cormorant Microcarbo pygmaeus	LC	winter	2002	224 individuals	A1
Whiskered Tern Chlidonias hybrida	LC	breeding	2000	45 breeding pairs	B2

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here

Threats to the site (pressure)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
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	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high

Condition of the site (state), by habitat
Habitat	Habitat detail	Reference area (ha)	Actual area (ha)	Habitat quantity (% remaining)	Habitat quality (carrying capacity)	Result
Wetlands (inland)		0	0	moderate (70-90%)	moderate (70-90%)	unfavourable

Conservation actions taken at the site (response)
Protected-area designation	Management planning	Other conservation action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	A management plan exists but it is out of date or not comprehensive	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

For more information about IBA conservation status, please click here

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

IUCN Habitat	Habitat detail	Extent (% of site)
Wetlands (inland)		-

For further information about the IUCN habitat classification, please click here.

---

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Terkos Basin. Downloaded from http://datazone.birdlife.org/site/factsheet/9592 on 06/06/2023.