Numerous species of waterbirds use the area for roosting and as a stopover point during autumn migration. 36 species of mammals occur at the site. Ramsar site no. Vilsandi National Park . A large wilderness area comprised of a varied coastal landscape, archipelago, and brackish and freshwater relict lakes.
Predominant vegetation consists of coastal meadows and includes, reedbeds, forests, and cropland.
One third of the plant species present are rare for Estonia and include numerous endangered and vulnerable plants. Internationally important numbers of 249 species of waterbirds use the site for breeding, staging and wintering. Numerous species of mammals are present. Human activities include small-scale recreation and tourism, farming, forestry, and fishing. Ramsar site no. 913.