Lake Hornborga

IBA Criteria

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
Common Teal Anas crecca LC 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

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2018 medium favourable medium
Was the whole site covered? Yes State assessed by Habitat
Accuracy of information good

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

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Rösjö mosse och Mårbysjön Special Protection Area (Birds Directive) 4,080 protected area overlaps with site 91
Hornborgasjön (lake) Ramsar Site, Wetland of International Importance 6,510 is identical to site 6,510
Hornborgasjön Nature Reserve 4,080 protected area overlaps with site 4,000
Hornborgasjön Special Protection Area (Birds Directive) 262 protected area contained by site 4,080
Fageluddens Nature Reserve 15 protected area contained by site 15
Fågeludden, Hornborga Nature Reserve 16 protected area contained by site 16
Bjurum-Dagsnäs Wildlife and Plant Sanctuary 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

Land-use Extent (% of site)
agriculture -
forestry -
nature conservation and research -
tourism/recreation -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Lake Hornborga. Downloaded from on 03/04/2020.