Simul, Sissoo, Riverine grasslands and various rare species of plants like Orchids 2) East Himalayan Upper Bhabar Sal mainly present at Jalpaiguri district which is characterised by dense population of Microstegium chiliatum, Sal i.e. Shorea robusta. Others are Terminalia tomentosa, Schima wallichii And the 3) Eastern Tarai Sal Forest generally found in lower altitudes compared to other two types of forest. This type of forest characterised by various species of bamboos, ferns, and Sal which is found in Baikunthapur Forest, near Siliguri city. Rapid growth of city causing deforestation, making Siliguri warmer day by day and unbalancing the ecosystem. Fauna Siliguri is located in the Terai region ("moist land"), a belt of marshy grasslands and dense tropical deciduous moist forests at the base of Himalaya range which is rich in biodiversity, containing numerous rare species of flora and fauna. These forests are characterised by their distinct wildlife variety. Mahananda Wildlife Sanctuary near Siliguri is famous for elephants. Sukna is the gateway to this sanctuary, which is 12 km from Siliguri. These sub-Himalayan forests are the home of various types of wild animals like the elephant, tiger, Indian bison, barking deer, wild pig, monkey, civet, snake, lizard, mountain goat, sambar, chital and fishing cat. These forests are also home of about 243 different bird species like the pied hornbill, egret, kingfisher, drongo, fly catcher, woodpecker and others. Another common sight is migratory water birds. Transport Road NH 27 crosses through the heart of the city which is now a part of AH2 project. Siliguri originates the century-old Hill Cart Road that is NH 110 which connects Siliguri and Darjeeling (77 km) made in British period. Siliguri also originates NH 10 which connects Gangtok, NH 12 which connects Pankhabari-Mirik. The highways NH 327, that connects Siliguri — Panitanki and NH 327B connecting Panitanki - Mechi Bridg, are also part of AH2. It connects to adjacent countries through following routes: Nepal: via Panitanki Bangladesh: via Phulbari China: via Nathula, Sikkim Bhutan: via Jaigaon Bus service Tenzing Norgay Bus Terminus: Tenzing Norgay Bus Terminus is the main bus terminus serves as bus depot for both Government and private bus service which operated by NBSTC. It connects to cities in Sikkim, Assam, Bihar, Jharkhand, Meghalaya etc. and all other districts and cities in West Bengal like Darjeeling, Kalimpong, Jalpaiguri, Cooch Behar, Malda, Balurghat, Raiganj, Dalkhola, Berhampore, Kolkata, Asansol, Suri etc. Sikkim Nationalised Transport Bus Terminus: