The Khao Nang Rum wildlife Research Station is located in Huai Kha Khaeng Wildlife Sanctuary in Uthai Tani Province, Thailand. The sanctuary is 2, 575 square kilometers of continuous forested landscape and adjoins Thung Yai Naresuan Wildlife Sanctuary to the west and together form the largest legislated protected area in mainland Southeast Asia. Huai Kha Khaeng is home to a variety of fauna including elephants, tigers, leopards, clouded leopards, hornbills, Asian tapir, gaur, banteng, wild water buffalo, and several species of nonhuman primates (gibbons, five species of macaques, silver leaf monkeys, and Phayre's leaf monkey). The Khao Nang Rum Wildlife Research Station is home to the Regional Tiger Research and Conservation Center. During my dissertation research, I habituated four groups of white-handed gibbons and began the habituation process for several more. Groups of langurs and macaques also came in contact with us, opening up the possibility of future behavioral studies at the population level.