Svalbard is an Arctic, wilderness series of islands comprising the northernmost part of the Norwegian territories. It is mostly uninhabited, with only about 3,000 people, yet covers an area of 61,020 square kilometres (23,560 sq mi).
In addition to humans, three primarily terrestrial mammalian species inhabit the archipelago: the Arctic fox, the Svalbard reindeer, and accidentally introduced southern vole—which is only found in Grumant. Attempts to introduce the Arctic hare and the muskox have both failed. There are fifteen to twenty types of marine mammals, including whales, dolphins, seals, walruses, and polar bears.
Polar bears are the iconic symbol of Svalbard, and one of the main tourist attractions. While the bears are protected, anyone outside of settlements is required to carry a rifle to kill polar bears in self defense, as a last resort should they attack. Svalbard and Franz Joseph Land share a common population of 3,000 polar bears, with Kong Karls Land being the most important breeding ground. The Svalbard reindeer (R. tarandus platyrhynchus) is a distinct sub-species, and while previously almost extinct, hunting is permitted for both it and the Arctic fox. There are a limited number of domesticated animals in Russian settlements.
About thirty types of bird are found on Svalbard, most of which are migratory. The Barents Sea is among the areas in the world with most seabirds, with about 20 million individuals during late summer. The most common are little auk, northern fulmar, thick-billed murre and black-legged kittiwake. Sixteen species are on the IUCN Red List. Particularly Bjørnøya, Storfjorden, Nordvest-Spitsbergen and Hopen are important breeding ground for seabirds. The Arctic tern has the furthest migration, all the way to Antarctica. Only two songbirds migrate to Svalbard to breed: the snow bunting and the wheatear. rock ptarmigan is the only bird to overwinter. Remains of Predator X from the Jurassic period have been found; it is the largest dinosaur-era marine reptile ever found—a pliosaur estimated to be almost 15 m (49 ft) long.