The Southeast Asian islands of Borneo and Sumatra, located on the Equator, are home to some of the world’s most diverse rain forests and Southeast Asia’s last intact forests. Borneo is the world’s third largest island, covering an area slightly larger than Texas. Sumatra is the world’s sixth largest island. The islands’ tropical climate and diverse ecoregions have created habitats that house thousands of unique species and the world’s last remaining Sumatran tigers, orangutans, pygmy elephants, and Sumatran rhinos. Massive rivers cut across the landscape. These are the islands’ lifelines, offering transport and and providing the freshwater needs for the islands’ people.