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Location Finland, Oulun lääni
Central coordinates 27o 8.00' East  65o 8.00' North
IBA criteria B2, B3, C6
Area 27,610 ha
Altitude 100 m
Year of IBA assessment 2000


Site description A large wilderness area between the upper courses of the Iijoki and Kiiminkijoki rivers, with well-developed aapa mires and a multitude of streams and rivulets. Interspersed amongst the peatlands are small islands of mostly primeval boreal forest containing large amounts of dead wood. The area remains predominantly free of human activity.

Key Biodiversity An important breeding area for boreal avifauna, and one of the best breeding sites in Finland for large, shy species such as Cygnus cygnus, Anser fabalis and Grus grus.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Common Crane Grus grus breeding  1996  11-50 breeding pairs  poor  B2, C6  Least Concern 
Wood Sandpiper Tringa glareola breeding  1996  501-1,000 breeding pairs  poor  B2  Least Concern 
Short-eared Owl Asio flammeus breeding  1996  11-50 breeding pairs  poor  B2, C6  Least Concern 
Common Redstart Phoenicurus phoenicurus breeding  1996  501-1,000 breeding pairs  poor  B2  Least Concern 
Parrot Crossbill Loxia pytyopsittacus breeding  1996  51-100 breeding pairs  poor  B3  Least Concern 

IBA Monitoring

2010 medium favourable medium
Medium - based upon reliable but incomplete / partially representative data

Natural system modifications dams & water management/use - abstraction of ground water (agricultural use) happening now some of area/population (10-49%) slow but significant deterioration medium

Grus grus Common Crane 250 250 breeding pairs 100 favourable
Tringa glareola Wood Sandpiper 825 825 breeding pairs 100 favourable
Phoenicurus phoenicurus Common Redstart 750 1000 breeding pairs 100 favourable
Loxia pytyopsittacus Parrot Crossbill 120 120 breeding pairs 100 favourable

Whole area of site (>90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Some limited conservation initiatives are in place  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Leväsuon-Kärppäsuon soidensuojelualue Protected Mire 2,291 unknown 0  
Olvassuon luonnonpuisto Strict Nature Reserve 7,138 protected area contained by site 5,980  
Oravisuon-Näätäsuon-Sammakkosuon soidensuojelualue Protected Mire 7,405 unknown 0  


IUCN habitat Habitat detail Extent (% of site)
Forest Native coniferous woodland  20%
Wetlands (inland) Raised bogs  80%

Land use

Land-use Extent (% of site)
unknown -

Protection status National Partial International High5,980 ha of IBA covered by Strict Nature Reserve (Olvassuo, 5,980 ha). 8,483 ha of IBA covered by Peatland Reserves (Leväsuo-Kärppäsuo, 2,191 ha, Oravisuo-Näatäsuo-Sammakkosuo, 6,327 ha). 27,610 ha of IBA covered by Special Protection Area (Olvassuo).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Olvassuo-Oravisuo-Näätäsuo-Sammakkosuo. Downloaded from on 26/10/2016

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