This area is rich with animal wildlife with a wide range of species. Veun Sai forest is also providing food, firewood, medicinal plants and fresh water for local communities.
In 2010, a ranger discovered a new species of Gibbon in the area, the Yellow cheeked crested gibbon. Since then conservation effords have been stepped up to protect this animal. Today, Veun Sai is the only place in the world where tourists can regularly spot the elusive Northern yellow-cheeked crested gibbon in the wild.