email a friend
printable version
Location Finland, Länsi-Suomen lääni
Central coordinates 22o 7.00' East  60o 56.00' North
IBA criteria B1i, B3, C3, C6
Area 2,090 ha
Altitude 40 m
Year of IBA assessment 2000


Site description Three adjacent, shallow and nutrient-rich lakes with lush vegetation on the upper course of the Lapijoki river. Some parts of the shoreline are bordered by wide marshes. The water-levels of Koskeljärvi and Pitkäjärvi lakes are regulated, which has increased the lake's value for birds on the former, but on the latter has caused over-eutrophication. Koskeljärvi, the most important ornithologically, is the largest lake in south-western Finland without any settlements on its shores.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Common Pochard Aythya ferina breeding  1997  146 breeding pairs  good  B3  Least Concern 
Red-necked Grebe Podiceps grisegena breeding  1997  93 breeding pairs  good  B1i, C3  Least Concern 
Spotted Crake Porzana porzana breeding  1997  26 breeding pairs  good  B3, C6  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Kirkkolahden luonnonsuojelualue Private Nature Reserve 2 protected area overlaps with site 1  
Koskeljärvi - FI0200097 Birds Directive 1,821 protected area overlaps with site 1,501  
Tankan luonnonsuojelualue Private Nature Reserve 17 protected area overlaps with site 17  


IUCN habitat Habitat detail Extent (% of site)
Forest   10%
Wetlands (inland) Raised bogs; Standing freshwater  90%

Land use

Land-use Extent (% of site)
not utilised 100%

Protection status National Low International Partial18 ha of IBA covered by Protected Area on Private Land (Kirkkolahti, 1 ha). 17 ha of IBA covered by Protected Area on Private Land (Tanska, 17 ha). 1,539 ha covered by Special Protection Area (Koskeljärvi).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Koskeljärvi, Vaaljärvi and Pitkäjärvi lakes. Downloaded from on 23/10/2014

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