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The site was identified as important in 2005 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
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	VU	passage	1996	438-3,110 individuals	A4ii, B1iii, C2
A4iv Species group - soaring birds/cranes	n/a	passage	1996-2004	147,002-154,913 individuals	A4iv, B1iv, C5
A4iii Species group - waterbirds	n/a	winter	-	min 20,000 individuals	A4iii, C4

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2005) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2005. The most recent assessment (2007) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Pied Avocet Recurvirostra avosetta	450	150	breeding pairs	34	very unfavourable
Charadrius alexandrinus	80	7	breeding pairs	9	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other 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

Year	Protected Area	Designation	% overlap with IBA
1980	Atanasovsko ezero	Poddarzhan Rezarvat	14
1980	Atanasovo Lake	Managed Reserve	15
1984	Atanasovo Lake	Ramsar Site, Wetland of International Importance	19
2002	Nesebar	State Game Husbandries	4
2006	Atanasovsko ezero	Site of Community Importance (Habitats Directive)	100
2007	Atanasovsko ezero	Special Protection Area (Birds Directive)	100
2007	Burgaski solnitsi	Zashtitena Mestnost	13

The Local Conservation Group(s) listed below are working to conserve this IBA.

Name	Year formed
BSPB Bourgas Branch	0

For more information on BirdLife's work with Local Conservation Groups, please click here.

Habitat1	Habitat detail	% of IBA
Artificial/Aquatic & Marine		major (>10)
Marine Coastal/Supratidal		major (>10)
Artificial/Terrestrial	Arable land, Other urban and industrial areas, Perennial crops, orchards and groves, Ruderal land	-
Grassland	Mesophile grasslands, Humid grasslands	-
Marine Intertidal		-

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100
other	99
agriculture	1
urban/industrial/transport	1

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Atanasovsko Lake (Bulgaria). Downloaded from https://datazone.birdlife.org/site/factsheet/atanasovsko-lake-iba-bulgaria on 23/11/2024.