Popular activities in the park include butterfly and bird watching, animal watching and trekking. The Park has numerous butterflies and birds as surveys indicate that over 293 species of birds use KhaoYai as a feeding ground. In addition, the park is home to an abundance of wildlife. The most frequently spotted animal is the deer that grazes on grass plains and sometimes come to be fed around the park office. Other animals spotted include elephants, sun bears, wild boars, monkeys, tigers, gaurs, and mountain goats.