Mietoistenlahti bay

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
Greylag Goose Anser anser LC passage 1994 1,001-5,000 individuals A4i, B1i, C3
Goosander Mergus merganser LC passage 1994 1,001-5,000 individuals A4i, B1i, C3

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)
2010 medium favourable low
Was the whole site covered? No State assessed by Population
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) no or imperceptible deterioration low
Pollution agricultural & forestry effluents - type unknown/unrecorded happening now some of area/population (10-49%) slow but significant deterioration medium

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Anser anser Greylag Goose 1800 1800 individuals 100 favourable
Mergus merganser Goosander 2000 2300 individuals 100 favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Some of site covered (10-49%) A management plan exists but it is out of date or not comprehensive Some limited conservation initiatives are in place low
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
TOPOKARIN LUONNONSUOJELUALUE Yksityinen luonnonsuojelualue 101 protected area overlaps with site 106
Tammimäen lehtojensuojelualue Lehtojensuojelualue 3 protected area overlaps with site 0
Saarenaukko, Silakkakari Yksityinen luonnonsuojelualue 17 protected area contained by site 0
Niittyrannan luonnonsuojelualue Yksityinen luonnonsuojelualue 15 protected area overlaps with site 0
Mynäjoen suisto, Tervoinen Yksityinen luonnonsuojelualue 13 protected area contained by site 0
Mietoistenlahti, Vesialue Yksityinen luonnonsuojelualue 82 protected area overlaps with site 0
Mietoistenlahti Special Protection Area (Birds Directive) 586 protected area overlaps with site 480
Mietoistenlahden luonnonsuojelualue Valtion luonnonsuojelualue 212 protected area contained by site 0
Haaviston luonnonsuojelualue Yksityinen luonnonsuojelualue 1 protected area contained by site 0


IUCN Habitat Habitat detail Extent (% of site)
Coastline Lagoons -
Marine Coastal/Supratidal -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
tourism/recreation -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Mietoistenlahti bay. Downloaded from on 27/11/2022.