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The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2016) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Marine Coastal/Supratidal	moderate (70-90%)	moderate (70-90%)	unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	likely in short term (within 4 years)	whole area/population (>90%)	very rapid to severe deterioration	very high
Transportation and service corridors	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other 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site (50-90%) covered (including the most critical parts for important bird species)	A management plan exists but it is out of date or not comprehensive	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

Year	Protected Area	Designation	% overlap with IBA
-	Istanbul Catalca Cilingoz YHGS	Wildlife Development Area	100
1987	Kırklareli Kasatura Basin	Nature Protect Area	100
2010	Terkos Lake	Wetland of Local Importance	100

Habitat1	Habitat detail	% of IBA
Forest		major (>10)
Marine Coastal/Supratidal		major (>10)
Shrubland	Heathland, Sclerophyllous scrub, garrigue and maquis	major (>10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Terkos Basin (Türkiye). Downloaded from https://datazone.birdlife.org/site/factsheet/terkos-basin-iba-türkiye on 23/11/2024.