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Year of most recent IBA criteria assessment: 2005

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Mute Swan Cygnus olor	LC	winter	1997	34-875 individuals	B1i, C3
Red-breasted Goose Branta ruficollis	VU	winter	2003	1,444 individuals	A1, A4i, B1i, C1, C2
Greater White-fronted Goose Anser albifrons	LC	winter	2000	16,010 individuals	A4i, B1i, C3
Common Shelduck Tadorna tadorna	LC	winter	1997	1,102-4,036 individuals	A4i, B1i, C3
Ferruginous Duck Aythya nyroca	NT	passage	1996	2-88 individuals	A1, C1
Eurasian Spoonbill Platalea leucorodia	LC	passage	1996	15-130 individuals	B1i, C2
Glossy Ibis Plegadis falcinellus	LC	passage	1996	70-260 individuals	C2
Common Little Bittern Ixobrychus minutus	LC	breeding	1996	25-30 breeding pairs	C6
Dalmatian Pelican Pelecanus crispus	NT	winter	2004	287 individuals	A1, A4i, B1i, C1, C2
Dalmatian Pelican Pelecanus crispus	NT	passage	1996	158-1,695 individuals	A1, A4i, B1i, C1, C2
Pygmy Cormorant Microcarbo pygmaeus	LC	winter	2002	250 individuals	A1, A4i, B1i, C1, C2
Pygmy Cormorant Microcarbo pygmaeus	LC	passage	1996	14-565 individuals	A1, A4i, B1i, C1, C2
Pied Avocet Recurvirostra avosetta	LC	breeding	1996	557-725 breeding pairs	A4i, B1i, B3, C2, C6
Pied Avocet Recurvirostra avosetta	LC	passage	1997	1,134-7,570 individuals	A4i, B1i, C2
Black-winged Stilt Himantopus himantopus	LC	breeding	1996	31-71 breeding pairs	C6
Kentish Plover Charadrius alexandrinus	LC	breeding	1996	70-80 breeding pairs	B2, C6
Slender-billed Curlew Numenius tenuirostris	CR	non-breeding	1996	1 individuals	A1, C1
Slender-billed Curlew Numenius tenuirostris	CR	passage	1996	1-3 individuals	A1, C1
Collared Pratincole Glareola pratincola	LC	breeding	1997	15-20 breeding pairs	C6
Collared Pratincole Glareola pratincola	LC	non-breeding	2003	120 individuals	B1i, C2
Little Tern Sternula albifrons	LC	breeding	1996	18-158 breeding pairs	C2, C6
Common Tern Sterna hirundo	LC	breeding	1996	58-830 breeding pairs	C6
Sandwich Tern Thalasseus sandvicensis	LC	breeding	1996	10-772 breeding pairs	B1i, C2, C6
Greater Spotted Eagle Clanga clanga	VU	passage	1996	6-16 individuals	A1, C1
Red-footed Falcon Falco vespertinus	NT	passage	1996	438-3,110 individuals	A4ii, B1iii, C2
A4iii Species group - waterbirds	n/a	winter	-	20,000 individuals	A4iii, C4
A4iv Species group - soaring birds/cranes	n/a	passage	1996-2004	147,002-154,913 individuals	A4iv, B1iv, C5

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
Agricultural expansion and intensification	livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Condition of key/trigger populations (state)
Scientific	Common	TargetPop	ActualPop	Units	Remaining	Result
Recurvirostra avosetta	Pied Avocet	450	150	breeding pairs	34	very unfavourable
Charadrius alexandrinus		80	7	breeding pairs	9	very unfavourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Some of site covered (10-49%)	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Not assessed	low

For more information about IBA monitoring please click here

Protection status:

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Nesebar	State Game Husbandries	84,590	protected area overlaps with site	0
Burgaski solnitsi	Zashtitena Mestnost	965	protected area contained by site	0
Aytoska planina	Site of Community Importance (Habitats Directive)	29,379	protected area is adjacent to site	0
Atanasovsko ezero	Site of Community Importance (Habitats Directive)	7,210	is identical to site	0
Atanasovsko ezero	Special Protection Area (Birds Directive)	7,210	is identical to site	7,209
Atanasovsko ezero	Poddarzhan Rezarvat	1,032	protected area contained by site	0
Atanasovo Lake	Ramsar Site, Wetland of International Importance	1,404	protected area contained by site	1,404
Atanasovo Lake	Managed Reserve	1,050	protected area contained by site	1,050

The local conservation groups below are working to support conservation at this IBA.

Name	Year formed
BSPB Bourgas Branch	0

For more information on BirdLife's work with Local conservation groups please click here.

IUCN Habitat	Habitat detail	Extent (% of site)
Grassland	Mesophile grasslands, Humid grasslands	-
Wetlands (inland)	Standing brackish and salt water, Water fringe vegetation	-
Artificial/Terrestrial	Arable land, Other urban and industrial areas, Perennial crops, orchards and groves, Ruderal land	-
Coastline	Salt marshes	-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
nature conservation and research	-
agriculture	-
other	-
urban/industrial/transport	-

For further information about the land use classification please click here.

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Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Atanasovsko Lake. Downloaded from http://www.birdlife.org on 15/04/2021.