The site was identified as important in 2015 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species'):Species | Current IUCN Red List Category | Season | Year(s) | Population estimate at site | IBA criteria met |
---|---|---|---|---|---|
Long-tailed Duck Clangula hyemalis | VU | passage | 1989-2014 | 12,092-30,000 individuals | B1i, C3 |
Common Eider Somateria mollissima | NT | passage | 1996 | 30,000 individuals | A4i, B1i, C3 |
A4iii Species group - waterbirds | n/a | passage | 1996 | 41,000 individuals | A4iii, C4 |
The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2015).
IBA conservation assessment | |||
---|---|---|---|
Year of assessment (most recent) | State (condition) | Pressure (threat) | Response (action) |
2010 | unfavourable | medium | low |
Was the whole site assessed? | State assessed by | Accuracy of information | |
yes | population | medium |
State (condition of the trigger species' populations) | ||||||
---|---|---|---|---|---|---|
Scientific name | Common name | Reference population | Actual population | Units | % of population remaining | Result |
Somateria mollissima | Common Eider | 30000 | 18000 | individuals | 60 | unfavourable |
Pressure (threats to the trigger species and/or their habitats) | |||||
---|---|---|---|---|---|
Threat level 1 | Threat level 2 | Timing | Scope | Severity | Result |
Human intrusions and disturbance | recreational activities | happening now | small area/few individuals (<10%) | no or imperceptible deterioration | low |
Pollution | agricultural & forestry effluents - nutrient loads | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
Pollution | domestic & urban waste water - sewage | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
Transportation and service corridors | shipping lanes | 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-area designation | Management planning | Other conservation action | Result |
Some of site covered (10-49%) | No management plan exists but the management planning process has begun | Some limited conservation initiatives are in place | low |
Protected area (PA) | PA designation | PA area (ha) | Relationship of PA with IBA | Overlap of PA with IBA (ha) |
---|---|---|---|---|
Uddskatanin luonnonsuojelualue | Valtion luonnonsuojelualue | 32 | protected area contained by site | 29 |
TULLINIEMEN LUONNONSUOJEL | Yksityinen luonnonsuojelualue | 2,245 | protected area contained by site | 2,338 |
Tulliniemen linnustonsuojelualue/ Tulliniemi bird protection area | Baltic Sea Protected Area (HELCOM) | 2,566 | protected area overlaps with site | 0 |
Tulliniemen linnustonsuojelualue | Site of Community Importance (Habitats Directive) | 2,566 | protected area overlaps with site | 0 |
Tulliniemen linnustonsuojelualue | Special Protection Area (Birds Directive) | 2,566 | protected area overlaps with site | 2,566 |
Saaristomeri /Archipelago Sea | Baltic Sea Protected Area (HELCOM) | 59,842 | protected area is adjacent to site | 0 |
Saaristomeri | Site of Community Importance (Habitats Directive) | 49,735 | protected area overlaps with site | 0 |
Saaristomeri | Special Protection Area (Birds Directive) | 59,842 | protected area overlaps with site | 0 |
Saaristomeren kansallispuisto | Kansallispuisto | 52,582 | protected area overlaps with site | 0 |
Hanko western archipelago | Baltic Sea Protected Area (Helcom) | 5,265 | protected area contained by site | 5,295 |
Bird Wetlands of Hanko and Tammisaari | Ramsar Site, Wetland of International Importance | 55,196 | protected area overlaps with site | 0 |
Habitat (IUCN level 1) | Habitat detail | Extent (% of site) |
---|---|---|
Marine Neritic | - | |
Marine Coastal/Supratidal | - | |
Unknown | - |
Land-use | Extent (% of site) |
---|---|
tourism/recreation | - |
urban/industrial/transport | - |
unknown | - |
Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Hanko western archipelago. Downloaded from
http://datazone.birdlife.org/site/factsheet/hanko-western-archipelago-iba-finland on 30/11/2023.