Franz Josef Land and snow bunting. Some ivory gulls, little auks and Brünnich's guillemots opt to spend the winter on the islands. The polar bear population of Franz Josef Land lies within the Barents Sea subpopulation, which also includes polar bears inhabiting Svalbard and the western coast of Novaya Zemlya. In 2004, the Barents Sea subpopulation was estimated at 2,650. There is also a population of Arctic fox, which typically have their territories near seabird habitats. Being declared as a marine mammal sanctuary, the island has rich biodiversity of rare marine mammals. Three species of seals habit the archipelago. Harp seal is the
Administrative divisions of Arkhangelsk Oblast Administrative divisions of Arkhangelsk Oblast Within the framework of administrative divisions, Arkhangelsk Oblast is divided into six cities and towns of oblast significance, twenty-one districts, and two island territories (Franz Joseph Land and Victoria Island). Besides, Mirny is a town under the federal government management. In terms of the area, the biggest administrative districts are Novaya Zemlya () and Mezensky District (). The smallest one is Solovetsky District. In terms of the population, the biggest administrative district is Velsky District (61,819 in 2002), the smallest ones are Solovetsky District (968), Novaya Zemlya (2716), and Leshukonsky District (10,708). Most of the