The Sukla Phanta Wildlife Reserve is a protected area in the Terai of the Far-Western Region, Nepal, covering 305 km2 (118 sq mi) of open grassland, forests, riverbeds and tropical wetlands at an altitude of 174 to 1,386 metres (571 to 4,547 ft). It was gazetted in 1973 as Royal Sukla Phanta Wildlife Reserve. A small part of the reserve extends north of the East-West Highway to create a corridor for seasonal migration of wildlife into the Sivalik Hills. The Syali River forms the eastern boundary southward to the international border with India, which demarcates the reserve’s southern and western boundary.
Parsa Wildlife Reserve is a protected area in the Inner Terai lowlands of south-central Nepal. Established in 1984, it covers an area of 499 km2 (193 sq mi) in the Parsa, Makwanpur and Bara districts and is the largest wildlife reserve in the country. In altitude it ranges from 435 metres (1,427 ft) to 950 metres (3,120 ft) in the Siwalik Hills.
In the north of the protected area the Rapti River and Siwalik Hills form a natural boundary to human settlements. In the east it extends up to the Hetauda - Birgunj highway.
The Koshi Tappu Wildlife Reserve is a protected area in the Terai of eastern Nepal covering 175 km2 (68 sq mi) of wetlands in the Sunsari, Saptari and Udayapur Districts. In altitude it ranges from 75 to 81 metres (246 to 266 ft) and consists of extensive mudflats, reed beds, and freshwater marshes in the floodplain of the Sapta Kosi River. It was established in 1976 and designated as a Ramsar site in December 1987.
It can be accessed from the Mahendra Highway. A study of the reserve was conducted between 1997 to 1998 by the Central Department of Zoology, Tribhuvan University in Kathmandu.