Yellow-backed duiker  The yellow-backed duiker ("Cephalophus silvicultor") is a forest dwelling antelope in the order Artiodactyla from the family Bovidae. Yellow-backed duikers are the most widely distributed of all duikers. They are found mainly in Central and Western Africa, ranging from Senegal to Western Uganda with possibly a few in Gambia. Their range also extends southward into Rwanda, Burundi, Zaire, and most of Zambia. The scientific name of the yellow-backed duiker is "Cephalophus sylvicultor". It is the type species of "Cephalophus", and placed in the subfamily Cephalophinae and family Bovidae. The species was first described by English botanist Adam Afzelius in the journal "Nova Acta Regiæ Societatis Scientiarum Upsaliensis" in 1815. The generic name has possibly originated from the combination of the New Latin word "cephal", meaning head, and the Greek word "lophos", meaning crest. The specific name "silvicultor" is composed by two Latin words: "silva", meaning wood, and "cultus", which relates to cultivation. This refers to its habitat. In 1981, Colin Groves and Peter Grubb identified three subgenera of "Cephalophus" : "Cephalophula", "Cephalpia" and "Cephalophus". They classified "C. silvicultor" under the third subgenus along with "C. spadix" (Abbott's duiker), "C. dorsalis" (bay duiker) and "C. jentinki" (Jentink's duiker). This subgenus is characterized by minimal sexual dimorphism and spotted coats (of juveniles). "C. silvicultor" forms a superspecies with "C. spadix". Four subspecies are recognised:  Yellow-backed duikers have a convex body shape, standing taller at the rump than the shoulders. They have very short horns, in length, which are cylindrical and ribbed at the base. An orange crest of hair can be found between their horns. Yellow-backed duikers get their name from the characteristic patch of yellow hairs on their rump, which stand when the duiker is alarmed or feels threatened. Yellow-backed duiker females often grow to be slightly larger than males.