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Year of most recent IBA criteria assessment: 2000

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Whooper Swan Cygnus cygnus	LC	passage	1996	700-900 individuals	A4i, B1i, C2
Greylag Goose Anser anser	LC	passage	1996	1,800-2,000 individuals	B1i, C3
Bean Goose Anser fabalis	LC	passage	1996	1,500-2,000 individuals	B1i, C3
Northern Pintail Anas acuta	LC	passage	1996	400-500 individuals	B1i, C3
Anas crecca	NR	passage	1996	6,000-7,000 individuals	B1i, C3
Red-necked Grebe Podiceps grisegena	LC	breeding	1996	40-60 breeding pairs	B1i, C3
Spotted Crake Porzana porzana	LC	breeding	1996	5-25 breeding pairs	C6
Common Crane Grus grus	LC	passage	1996	6,000-10,000 individuals	A4i, B1i, C2
Eurasian Bittern Botaurus stellaris	LC	breeding	1996	10-14 breeding pairs	B2, C6
Black Tern Chlidonias niger	LC	breeding	1996	25-45 breeding pairs	C2, C6
Western Marsh-harrier Circus aeruginosus	LC	breeding	1996	20-35 breeding pairs	C6
Common Grasshopper-warbler Locustella naevia	LC	breeding	1996	30-50 breeding pairs	B3
A4iv Species group - soaring birds/cranes	n/a	passage	1996	min 10,000 individuals	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	annual & perennial non-timber crops - agro-industry farming	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Agricultural expansion and intensification	livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Human intrusions and disturbance	recreational activities	happening now	small area/few individuals (<10%)	slow but significant deterioration	low
Natural system modifications	dams & water management/use - abstraction of surface water (agricultural use)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

Condition of habitat (state)
Habitat	Habitat Detail	Reference Area (ha)	Actual Area (ha)	% of habitat remaining	% of carrying capacity (overall)	Result
Grassland	Humid grasslands	0	0	good (> 90%)	good (> 90%)	near favourable
Wetlands (inland)	Standing freshwater	0	0	good (> 90%)	good (> 90%)	near favourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

For more information about IBA monitoring please click here

Protection status:

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Rösjö mosse och Mårbysjön	Site of Community Importance (Habitats Directive)	1,724	protected area overlaps with site	0
Rösjö mosse och Mårbysjön	Special Protection Area (Birds Directive)	1,724	protected area overlaps with site	91
Mårbykärret	Naturreservat	21	protected area overlaps with site	0
Hornborgasjön	Site of Community Importance (Habitats Directive)	4,080	protected area overlaps with site	0
Hornborgasjön	Naturreservat	4,080	protected area overlaps with site	4,000
Hornborgasjön	Special Protection Area (Birds Directive)	4,080	protected area overlaps with site	4,080
Hornborgasjön	Ramsar Site, Wetland of International Importance	6,510	is identical to site	6,510
Fageluddens	Nature Reserve	15	protected area contained by site	15
Fågeludden, Hornborga	Nature Reserve	16	protected area contained by site	16
Bjurum-Dagsnäs	Djur- och växtskyddsområde	3,623	protected area overlaps with site	1,982
Bjurum - Dagsnäs	Nature Reserve	110	protected area contained by site	110

IUCN Habitat	Habitat detail	Extent (% of site)
Forest	Native coniferous woodland, Mixed woodland	-
Grassland	Dry siliceous grassland, Humid grasslands	-
Wetlands (inland)	Standing freshwater, Raised bogs, Water fringe vegetation	-
Artificial/Terrestrial	Arable land	-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
agriculture	-
forestry	-
nature conservation and research	-
tourism/recreation	-

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

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Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Lake Hornborga. Downloaded from http://www.birdlife.org on 26/01/2021.