The Site consists of several protected areas on the island of Runde, the neighbouring islands Skjervøya and Grasøya and surrounding islets, which support nationally endangered bird species such as the black-legged kittiwake Rissa tridactyla and the common murre Uria aalge. Cliff-nesting birds dominate the wildlife, and Runde regularly supports more than 120,000 breeding pairs. The vegetation on the hillsides and the plateau of Runde is dominated by open heathland, small freshwater ponds and grassland, as well as mires which are important for carbon storage and provide nesting sites for species such as the great skua Stercorarius skua. There are no human settlements inside the protected areas, but the Site is used for tourism, sheep grazing, scientific research, and the SEAPOP seabird monitoring and mapping project.