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Location Finland, Etelä-Suomen lääni
Central coordinates 26o 20.00' East  60o 13.00' North
IBA criteria B1i, B1ii, B2, B3, C2, C3, C6
Area 18,250 ha
Year of IBA assessment 2000


Site description A fairly large offshore archipelago in the middle of the Gulf of Finland. The mainly small and rocky islands and islets are separated by large expanses of open sea. The larger islands support mixed forest or Juniperus stands, sometimes interspersed with small patches of meadow.

Key Biodiversity An important area for island-breeding birds, including the only nationally important breeding cliff for Uria aalge (23-28 pairs).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Caspian Tern Hydroprogne caspia breeding  1997  42 breeding pairs  good  B1i, B2, C2, C6  Least Concern 
Razorbill Alca torda breeding  1997  320-590 breeding pairs  good  B1ii, B3, C3  Near Threatened 
Black Guillemot Cepphus grylle breeding  1997  169-267 breeding pairs  good  B1ii, B2  Least Concern 

IBA Monitoring

2010 medium near favourable low
Good - based on reliable and complete / representative data

Human intrusions and disturbance recreational activities happening now some of area/population (10-49%) no or imperceptible deterioration low
Invasive & other problematic species, genes & diseases invasive non-native/alien species/diseases - unspecified species happening now some of area/population (10-49%) slow but significant deterioration medium

Hydroprogne caspia Caspian Tern 50 50 breeding pairs 100 favourable
Alca torda Razorbill 600 600 breeding pairs 100 favourable
Cepphus grylle Black Guillemot 300 250 breeding pairs 84 near favourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  No management plan exists but the management planning process has begun  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Aspskär Islands Wetlands of International Importance (Ramsar) 731 protected area contained by site 369  
Aspskärin luonnonsuojelualue Private Nature Reserve 366 protected area contained by site 731  


IUCN habitat Habitat detail Extent (% of site)
Sea   50%
Coastline Rock stacks and islets  50%

Land use

Land-use Extent (% of site)
tourism/recreation -
hunting -

Protection status National Low International Partial731 ha of IBA covered by Protected Area on Private Land (Aspskär, 731 ha). 731 ha of IBA covered by Ramsar Site (Aspskär, 731 ha). 14,277 ha of IBA covered by Special Protection Area (Pernajanlahtien ja Pernajan saariston)

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Pernaja outer archipelago. Downloaded from on 21/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife