Baltica data makes it difficult to locate the margin in the Arctic. Ordovician faunas indicate that most of Svalbard, including Bjørnøya, was part of Laurentia, but Franz Josef Land and Kvitøya (an eastern island of the Svalbard archipelago) most likely became part of Baltica in the Timanide Orogeny. The Taymyr Peninsula, in contrast, never was part of Baltica: southern Taymyr was part of Siberia whilst northern Taymyr and the Severnaya Zemlya archipelago were part of the independent Kara Terrane in the early Palaeozoic. The eastern margin, the Uralide orogen, extends from the Arctic Novaya Zemlya archipelago to the Aral Sea. The
Franz Josef Land most common, although it breeds in the White Sea. Slightly less common is the bearded seal. Walruses were previously hunted, dramatically reducing the formerly abundant species. They have been internationally protected since 1952 and their numbers have since been on the rise, with between one and three thousand walruses living in the archipelago. The population is common with Svalbard and northern Novaya Zemlya. Minke whales, humpback whale, and beluga whales are commonly seen around the island, and less commonly orcas and narwhales, with the archipelago being located on the northern edge of their summer range. Fin whales were newly confirmed