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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
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

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
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

Condition of key/trigger populations (state)
Scientific	Common	TargetPop	ActualPop	Units	Remaining	Result
Somateria mollissima	Common Eider	30000	18000	individuals	60	unfavourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	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 monitoring please click here

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap 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	Special Protection Area (Birds Directive)	2,566	protected area overlaps with site	2,566
Tulliniemen linnustonsuojelualue	Site of Community Importance (Habitats Directive)	2,566	protected area overlaps with site	0
Saaristomeri /Archipelago Sea	Baltic Sea Protected Area (HELCOM)	59,842	protected area is adjacent to site	0
Saaristomeri	Special Protection Area (Birds Directive)	59,842	protected area overlaps with site	0
Saaristomeri	Site of Community Importance (Habitats Directive)	49,735	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

IUCN Habitat	Habitat detail	Extent (% of site)
Marine Neritic		-
Coastline		-
Unknown		-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
tourism/recreation	-
urban/industrial/transport	-
unknown	-

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

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Hanko western archipelago. Downloaded from http://www.birdlife.org on 27/03/2023.