Following its 2008 merger with Usangu Game Reserve and other notable wetlands, Ruaha is counted among Tanzania's biggest national parks, spanning more than 20,000km². It is also a sizeable elephant haven and home to buffalo, huge populations of lion, leopard, and a profusion of bird species, including kingfishers, plovers, egrets, hornbills and sunbirds. Crocodiles and hippos thrive in the Great Ruaha River, which flows along the sanctuary’s eastern border and in the dry season between July and November, animals flock to the last remaining water sources, presenting an exceptional wildlife spectacle. There are a number of accommodation options available but some close for the wet season in March and April.