Lar Gibbon (hylobates lar)
All of these images were shot in Pakmeng, in Trang Province. The different colourations are a naturally occurring variation within the same species of gibbon.
Long-Tailed Macaque (macaca fascicularis)
We saw a troop of long-tailed macaques clamber down a steep cliff face to get to the Sok River, in Khao Sok. They were drinking from the river and retrieving fallen fruit. They had no problem wading or swimming out to rescue floating fruit that would otherwise be swept downstream.