The sitatunga or marshbuck (Tragelaphus spekii) is a swamp-dwelling antelope found throughout central Africa, centering on the Democratic Republic of the Congo, Cameroon, parts of Southern Sudan, Ghana, Botswana, Zambia, Gabon, Tanzania, Uganda and Kenya. The species was first described by the English explorer John Hanning Speke in 1863. The sitatunga is a medium-sized antelope. Males reach approximately at the shoulder, while females reach . Males typically weigh , while females weigh . The sitatunga has a shaggy, water-resistant coat. The body of this antelope is specially adapted to its swampy habitat. Only the males possess horns. The spiral horns have one or two twists, and are long.