Parsa wildlife reserve is the protected area situated in the lowland of Terai. Established in 1984 with an area of 499 sq.km the vegetation in this wildlife reserve is tropical to sub tropical mostly covered by Sal forest; in the same time the hill are covered with Pine, Khair, Sissoo and Silk cotton. Parsa Wildlife Reserve is a home to different wild animals including Wild elephant, Tiger, Leopard, Gaur, Blue bull and Wild dog. Other common animals found in the Reserve are Sambar, Chittal, Barking Deer, Langur monkey, Rhesus macaques, striped hyena, Palm civet and Jungle cat. Similarly 527 species of birds have been witnessed in the park which include peafowl, Red jungle fowl, flycatchers and woodpeckers along with them endangered Great hornbill is also found in the certain parts of the park. Besides birds and animals the park too provide habitat for different reptiles such as King cobra, Common cobra, Krait, Rat snake and Python.
Being a largest protected area in the whole country in the north Rapti River and Siwalik hills form a natural boundary to the human settlement. Adjacently west to this wildlife reserve is Chitwan National Park; this two along with Valmiki National Park of india represent the Tiger conservation unit. Before being transformed into protected area it used to be the hunting floor to the people of superior class. The Headquarter of the wildlife reserve is Adhabar which is at a distance of eight hour drive from Kathmandu which is on the Mahendra highway.