Khao Yai, Thailand’s largest park, which was declared a World Heritage site in 2004. The Dong Phayayen-Khao Yai Forest Complex spans 230 km between Ta Phraya National Park on the Cambodian border in the east, and Khao Yai National Park in the west.
Khao Yai is home to more than 800 species of fauna, including 112 mammal species (among them two species of gibbon), 392 bird species and 200 reptile and amphibian species. It is internationally important for the conservation of globally threatened and endangered mammal, bird and reptile species, among them 19 that are vulnerable, four that are endangered, and one that is critically endangered. Khao Yai’s forests are teeming with wildlife and birds, tread careful and move quietly and many are visible. Gibbons provide a jungle soundtrack with their mournful hoots & quiet trekkers may catch a glimpse of these tree-living apes. Macaques are often seen on the roadsides & Elephants can be seen at salt-licks whilst deep within the park tigers still prowl.Civets, squirrels, porcupines, and wild pigs add variety & Geckos are frequently seen catching insects on lodge walls and ceilings.Cicadas never seem to stop their rhythm & the "gak gak gak" laugh of the Indian PiedHornbill or the deep resonant "gok.gok" of the Great Hornbill canbe heard mingling with the numerous calls and cries of therest of the parks’ mammal, bird & insect population.