Bardiya lies in Bheri zone in the mid western region of Nepal. It covers 2025 square kilometers and lies west of Banke district, south of Surkhet district, east of Kailali district of Seti zone. To the south lies Uttar Pradesh, India; specifically the Lakhimpur and Bahraich districts of Awadh. Most of Bardiya is in the fertile Terai plains, covered with agricultural land and forest. The northernmost part of the district extends into the Churiya or Siwalik Hills. Bardiya National Park covers 968 km2 occupies most of the northern half of the district. This park is the largest undisturbed wilderness in Nepals Terai. It provides forest, grassland and riverine habitat for engendered mammal, bird and reptile species. More than 30 species of mammals and more than 250 of birds have been recorded. Most people living in this district are farmers. The district headquarters Gularia lies on the Babai River. The Karnali, one of Nepals largest rivers, divides into multiple branches when it reaches the Terai. The westernmost branch forms the boundary between Bardiya and Kailali districts. An eastern branch is called the Geruwa. The endangered Gangetic dolphin was often seen in its waters, but populations have been declining.