The Site includes two islands off Spitsbergen – Nordre Isøya and Isøykalven – several smaller islets and the surrounding sea. Nordre Isøya, the northern island, is covered with rich, grassy vegetation and small freshwater ponds, while Isøykalven, the southern island, supports less-developed vegetation. The area is among the most important localities of Spitsbergen for the nesting barnacle geese and the common eider. Polar bears regularly visit the Site. Apart from the traditional collection of eider down and eggs, which is occasionally permitted and considered sustainable, human activities are restricted to research and monitoring. Isøyane is part of the Sør-Spitsbergen National Park, and is a bird protection area.