The Lake Turkana Basin, while being a hot and dry area, includes several river systems and the 6,000 km2 + lake Turkana. Three rivers feed into the lake: The Turwel, Kerio and Omo. The Omo, from the highlands of Ethiopia contributes about 90 % of the lakes’ waters. The Kerio River comes from the south, from streams originating in parts of the Cherangani Hills and north-western Kenyan Highlands. The rivers and deltas close to TBI are home to a rich diversity of insect and bird life.