Caucasus Nature Reserve (Russian: Кавказский государственный природный биосферный заповедник имени Х. Г. Шапошникова) (also Caucasus, or Kavkasky) is a Russian 'zapovednik' (strict ecological reserve) covering a heavily mountainous section of the Northwest Caucasus Mountains. It is the largest and oldest in the territory of specially protected natural area in the Caucasus, having been created in 1924 as the Caucasian Bison Reserve. In 1979, the site was named a UNESCO Biosphere Reserve, and in 1999 included in a UNESCO World Heritage Site. In 2008 it was officially renamed after Khachatur (Christopher) G. Shaposhnikova the biologist who founded the reserve. The area is situated in the Mostovsky District of Krasnodar Krai, covering an area of 280,335 ha (1,082.38 sq mi).