Background
Olvassuo (27 073 hectares), Litokaira (30 382 ha) and Iso-Tilansuo-Housusuo (3 449 ha) are three extensive aapa mire areas in central Finland. Most (80 percent) of their surface area consists of priority habitats: aapa mires (65 percent), virgin forests, raised bogs and bog woodlands. Olvassuo is one of Europe's most impressive bird nesting are ...