The gerenuk Somali: garanuug (pronounced /\\ˈger-ə-ˌnu̇k, gə-ˈre-nək\\/) (Litocranius walleri), also known as the giraffe gazelle, is a long-necked antelope found in the Horn of Africa and the African Great Lakes region. The sole member of the genus Litocranius, the gerenuk was first described by Anglo-Irish naturalist Victor Brooke in 1878. It is characterised by its long, slender neck and limbs. The antelope is 80–105 centimetres (31–41 in) tall, and weighs between 28 and 52 kilograms (62 and 115 lb). Two types of colouration are clearly visible on the smooth coat: the reddish brown back or the "saddle", and the lighter flanks, fawn to buff. The horns, present only on males, are lyre-shaped. Curving backward then slightly forward, these measure 25–44 centimetres (9.8–17.3 in).