Among the mammal species living in Thung Yai are lar gibbon ("Hylobates lar"), various species of macaque ("Macaca") and lutung ("Trachypithecus"), Indochinese tiger ("Panthera tigris tigris"), Indochinese leopard ("Panthera pardus delacouri"), clouded leopard ("Neofelis nebulosa"), sun bear ("Helarctos malayanus") and Asian black bear ("Ursus thibetanus"), Malayan tapir ("Tapirus indicus"), Indian elephant ("Elephas maximus indicus"), gaur ("Bos gaurus"), hog deer ("Cervus porcinus"), sambar ("Rusa unicolor"), Fea's muntjac ("Muntiacus feae") und Sumatran serow ("Capricornis sumatraensis") as well as many bat species probably including Kitti's hog-nosed bat ("Craseonycteris thonglongyai"). Thung Yai is part of the Western Forest Complex, which is the largest tiger habitat in the Southeast Asia region, with around 200 of the animals living there. The area is known as a natural breeding area for tigers in Thailand and Myanmar as well.