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Location Finland, Länsi-Suomen lääni
Central coordinates 21o 30.00' East  59o 48.00' North
IBA criteria A4i, A4iii, B1i, B1ii, B2, B3, C3, C4
Area 73,500 ha
Year of IBA assessment 2000


Site description A very large area of outer archipelago inside the Saaristomeri National Park: the site's boundaries have been drawn to include the most ornithologically important parts of the park. Large areas of open water dominate the landscape, although the numerous islands are also impressive. Most of the islands are small, stony and treeless with steep shores. Jurmo, the largest, is ornithologically the most diverse and important, supporting long stony or sandy ridges and large, open areas of treeless heath. Boating and other human activities are much scarcer than within the inner archipelago.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Common Eider Somateria mollissima breeding  1995  11,500 breeding pairs  good  A4i, B1i, C3  Least Concern 
Great Black-backed Gull Larus marinus breeding  1995  170-190 breeding pairs  good  B3  Least Concern 
Razorbill Alca torda breeding  1995  200-220 breeding pairs  good  B1ii, C3  Least Concern 
Black Guillemot Cepphus grylle breeding  1995  130-150 breeding pairs  good  B1ii, B2  Least Concern 
A4iii Species group - waterbirds breeding  1995  20,000-49,999 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Archipelago Sea Area UNESCO-MAB Biosphere Reserve 4,200,000 protected area contains site 73,500  
Korppoo and Nauvo southern archipelago Baltic Sea Protected Area (Helcom) 59,409 protected area overlaps with site 31,721  
Saaristomeren kansallispuisto National Park 49,988 protected area contains site 73,500  
Saaristomeri - FI0200090 Habitats Directive 49,735 protected area overlaps with site 21,921  
Saaristomeri - FI0200164 Birds Directive 59,842 protected area overlaps with site 31,945  


IUCN habitat Habitat detail Extent (% of site)
Sea   -
Unknown   -

Land use

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

Protection status National High International High73,500 ha of IBA covered by National Park (Saaristomeri, 311,000 ha). 13,601 ha of IBA covered by two Special Protection Areas (Saaristomeri; Jurmo). 73,500 ha of IBA covered by Biosphere Reserve (Saaristomeri, 420,000 ha).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Korppoo and Nauvo southern archipelago. Downloaded from on 24/10/2014

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