The Mekong continues it's journey south marking the Eastern border of heart of South East Asia, Thailand. It is the juncture of many major regions, where temperate north meets tropical South, making it one of the most biodiverse countries in the world. It provides the breeding grounds of some of the most captivating wildlife on earth; and the Mekong is a source of life for these animals as they raise the next generation. A mountainous region filled with pockets of dense tropical forests, known as the Golden Triangle, home to a peculiar looking species of langur. These are seen clambering through the canopy finding leaves to so satisfy their insatiable appetites, rotating through between favoured feeding trees. Iconic giants are also enjoying then fresh growth spurred by recent rains, elephants: one of Earth's mega-herbivores. Whilst consuming more than a tonne of plant matter each week to fuel their massive bodies, they play vital role in the ecosystem. But even though they are the largest land animal, a herd always must remain on the defence by forming a protective circle around their calves, teaching them how to see off danger. However, the most important lesson is for babies to master their trunks, a vital tool used for almost every activity in elephant life. As the Mekong continues it's journey South, the hills of the north give way to wetlands, fed by the Mekong and its tributaries, providing the breeding ground for hundreds of bird species. Jacana pheasants scour the marshes for snails teaching their chicks how to hunt and navigate around the floating water world. These wetlands also provide the first glimpse of the majestic sarus crane, previously extinct in Thailand, this bird has recently been successfully reintroduced an icon of South East Asia's wildlife. These birds are embracing the rich source of food the marshes provide and are preparing for the breeding season. In a display of elaborate courtship rituals, they dance kick and flap before they pair off to breed in long-lasting pairs. Each year, as the wet season ends, people in the North of Thailand come together to celebrate the river in the annual festival honouring the water spirits, while the animals are preparing the next generations to find their place in the world around them.