FI081
Hanko western archipelago


IBA Justification

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

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
For more information about IBA conservation status, please click here

IBA Protection

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

Habitats

Habitat (IUCN level 1) Habitat detail Extent (% of site)
Marine Neritic -
Marine Coastal/Supratidal -
Unknown -
For more information about the IUCN Habitat classification, please click here.

Land use

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 04/12/2023.