Khao Sok’s ancient rainforests in southern Thailand shelter diverse wildlife. Jo, chief biologist for the region, surveys bat species - capturing them is dangerous and bites can cause serious infection. New species turn up regularly; Jo hopes to find a new bat. A reservoir fragments elephant habitat, and Jo seeks ways to reconnect populations. Limestone karsts extend to the southwest coast and into the Gulf, where cave‑dwelling white‑nest swiftlets produce prized edible nests harvested at great risk. Jo and his team patrol Khao Sok to count elephants; the park’s beauty belies the harsh effort required to live with nature.