Buxa Tiger Reserve is a Tiger reserve and National park in northern West Bengal, India, covering an area of 760 km2 (290 sq mi). In altitude, it ranges from 60 m (200 ft) in the Gangetic Plains to 1,750 m (5,740 ft) bordering the Himalayas in the north. At least 284 bird species inhabit the reserve.[1] Mammals present include Asian elephant, gaur, Sambar deer, clouded leopard, Indian leopard. Buxa Tiger Reserve lies in Alipurduar district of West Bengal. Its northern boundary runs along the international border with Bhutan. The Sinchula hill range lies all along the northern side of BTR and the eastern boundary touches that of the Assam state. National Highway No.31 C roughly runs along its southern boundary. It is the easternmost extension of extreme bio-diverse North-East India and represents highly endemic Indo-Malayan region. The fragile "Terai Eco-System" constitutes a part of this reserve. The Phibsoo Wildlife Sanctuary of Bhutan is contiguous to the north of BTR. Manas National Park lies on east of BTR. BTR, thus, serves as international corridor for Asian elephant migration between India and Bhutan. To the south-west, the Chilapata Forests form an elephant corridor to the Jaldapara Wildlife Sanctuary. The reserve encompasses as many as eight forest types. The divisional headquarters is located at Alipurduar.