The wide range of vegetation types in the Chitwan National Park is haunt of more than 700 species of wildlife and a not yet fully surveyed number of butterfly, moth and insect species. Apart from King Cobra and Indian rock python, 17 other species of snakes, Indian starred tortoise and monitor lizards occur. The Narayani-Rapti river system, their small tributaries and myriads of oxbow lakes is habitat for 113 recorded species of fish and mugger crocodiles.