Olvassuo Mires

A spring in the Olvassuo mires.

Olvassuo Mires

  • Country: 
  • Site number: 
  • Area: 
    27,073 ha
  • Designation date: 
  • Coordinates: 
    65°07'N 27°11'E
Materials presented on this website, particularly maps and territorial information, are as-is and as-available based on available data and do not imply the expression of any opinion whatsoever on the part of the Secretariat of the Ramsar Convention concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries.


The Site is one of the most representative mire areas in Finland, for its vegetation and as a breeding site for mire birds. Sedge fens with flarks and Sphagnum papillosum sedge fens are the most common mire types, with nutrient levels varying from raised bogs to rich fens. Meadowy poor fens and spruce mires run alongside the rivers, while the 13 lakes and several ponds and eskers, wooded dunes and ancient shore banks give variety to the landscape. Most of the coniferous forests are old-growth and dominated by pine. The Site also features some nationally vulnerable vascular plants such as early marsh-orchid (Dactylorhiza incarnata) and marsh saxifrage (Saxifraga hirculus). Bean goose (Anser fabalis), whooper swan (Cygnus cygnus), common crane (Grus grus), ruff (Philomachus pugnax), golden plover (Pluvialis apricaria) and wood sandpiper (Tringa glareola) use the Site during their migrations. Human uses of the Site include scientific research and reindeer husbandry.

Administrative region: 
Northern Ostrobothnia and Kainuu

  • National legal designation: 
    • Esker Conservation Programme - Kälväsvaara HSO110132, Iso Palovaara HSO110133
    • Mire Conservation Programme - Olvassuon-Oravisuon-Näätäsuon alue SSO110426, Leväsuon aarnialue SSO110449
    • Mire Protection Area - Oravisuon-Näätäsuon-Sammakkosuon SSA110082, Leväsuon-Kärppäsuon SSA110100
    • Strict Nature Reserve - Olvassuon luonnonpuisto LPU110009
  • Regional (international) legal designations: 
    • EU Natura 2000
  • Last publication date: 


Ramsar Information Sheet (RIS)

Additional reports and documents