Now WWF is working to save the remaining tigers and elephants of the dry forests, as well as the prey species on which the tiger depends.
Whilst the camera trap work in the area has focused on recording the elephant and tiger populations, a wide variety of other species have also been documented.
It is mostly found in lowland and highland tropical deciduous, semi-evergreen and evergreen forests.
The key menace is direct poaching of both tiger and its prey. Although extensive habitat is available in some landscapes, fragmentation driven by rapid development - especially road networks - is forcing tigers into scattered, small refuges that isolate the populations and increase accessibility for poachers.
Find out more about the Indo-Chinese tiger
Wild elephant populations are mostly small, isolated, and unable to join as ancient migratory routes are cut off by human settlements. Confrontations between elephants and people often lead to deaths on both sides, and poaching for ivory, meat and hides is still a widespread problem.
Find out more about the Asian elephant
Camera traps set up in the wilderness area have recorded a series of photos of the critically endangered wild water buffalo. The images are the first since a single photo was taken in 2001 by a joint survey conducted by the Wildlife Conservation Society and the Cat Action Treasury.
The wild water buffaloes in Srepok comprise the last remaining population in all of Cambodia, Vietnam, Laos, and eastern Thailand. Although the situation is serious in terms of population numbers, it is believed that the resident population – estimated at 30-50 animals – now at least stands a chance of survival.