Located in the extreme southwest of Nepal and adjacent to Indian borders, this reserve presents a diverse habitat to the abundant wildlife in its premises. A primary habitat for a population of 2000 swamp deer, wild elephants, tigers, leopards and wild boars are some other animal sightings while many migratory birds make a delightful experience.
With an area of 355 square kilometers, sal trees dominate the forests as large grasslands are found within the reserve. Marsh Mugger Crocodile and Indian Python are some reptiles found in near by river that flow here. A total of 200 bird species have been recorded in this reserve.