It is located in the south eastern part of Kenya. It was established to protect lower tana river forest and the two endangered species of monkey which are crested mangbey and the red colobus monkey. The river forest cuts through the dry woodland and the open savannah. This national reserve has rare species of birds such as white wingled apalis, open bill stork, martial eagle, bat hawk, pygmy falcon, and barred owlet. Mammals, amphibians and reptiles are also within the reserve.