Khao Yai National Park is one of the richest conservation areas in Thailand for fauna biodiversity, as its perimeters contain almost every tropical habitat. It is quite easy to see wildlife from your car or on nature trails, as they walk past or graze the grasslands both day and night. The unique environment and climatic conditions of Khao Yai create physical and biological factors which enable encounters with rare animals and insects only possible in Khao Yai, such as the fighting giant stag beetle.