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Location Finland, Länsi-Suomen lääni
Central coordinates 22o 34.00' East  61o 14.00' North
IBA criteria A1, B1i, C1, C2
Area 3,474 ha
Altitude 45 m
Year of IBA assessment 2000


Site description A complex of habitats, comprising the large, shallow and eutrophic Puurijärvi lake, open fields (220 ha) and several adjacent mires along the Kokemäki river. The lake is mainly bordered by forests and in summer becomes almost totally overgrown with vegetation. Isosuo and other mires are large raised bogs with extensive open areas of pools in the centre, and sparse swamp-forests or mixtures of swamps and forests at the edges.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Whooper Swan Cygnus cygnus passage  1997  400 individuals  B1i, C2  Least Concern 
White-tailed Sea-eagle Haliaeetus albicilla passage  1997  10-15 individuals  A1, C1  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Kokemäenjoki - FI0200148 Habitats Directive 187 protected area overlaps with site 28  
Puurijärven ja Isonsuon kansallispuisto National Park 2,697 protected area contained by site 2,538  
Puurijärvi - Isosuo - FI0200149 Birds Directive 3,431 protected area overlaps with site 2,986  
Puurijärvi-Isosuo - FI0200001 Habitats Directive 3,204 protected area overlaps with site 2,786  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Raised bogs; Standing freshwater  91%
Artificial - terrestrial   7%

Land use

Land-use Extent (% of site)
agriculture 7%
not utilised 90%

Protection status National Partial International High2,538 ha of IBA covered by National Park (Puurijärvi-Isosuo, 2,538 ha). 3,126 ha of IBA covered by Special Protection Area (Puurijärvi-Isosuo).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Puurijärvi-Isosuo wetlands. Downloaded from on 24/10/2014

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