The black duiker (Cephalophus niger), also known as tuba in Dyula, is a forest-dwelling duiker found in the southern parts of Sierra Leone, Liberia, Côte d'Ivoire, Ghana, Benin, and Nigeria. Black duikers stand around 500 mm (20 in) tall at the shoulder and weigh 15 to 20 kg (33 to 44 lb). They have, not surprisingly, black coats. The head is a rust colour with a large red crest between the ears. Black duikers have long, thin horns of 80 to 170 mm (3.1 to 6.7 in), but the horns of females reach only 30 mm (1.2 in).