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Bison (Bos gaurus) belongs to Artiodactyla Order and Bovidae Family. It is native to Nepal, India, Myanmar, Thailand and Malaysia in the world. It is found in Chure bhabar region, Parsa National Park, Chitwan National Park and Trijuga valley of Nepal. According to the Annual Report of DNPWC (2019), its population is 473. The lifespan of gaur is 20 to 30 years. The body is shining black in colour, head with light brown and lower park of legs with white in colour. Its height is 1.75 m to 2.2 m, length 2.5 m to 3.3 m and weight is about 1200 kg to 2000 kg. The gestation period of gaur is 9 months. It is listed as a vulnerable species in the IUCN Red List category and Appendix I of CITES. National red list of mammals categorizes it as a vulnerable species. The legal status of this species in Nepal is Protected (Appendix I) under the National Parks and Wildlife Conservation Act 1973. It is protected because of its heavy habitat loss. Its head is traded in national and international markets for decoration in home.