AT A GLANCE
- Common Name: Yellow-backed Duiker
- Scientific Name: Cephalophus silvicultor
- Category: Mammals
- Subcategory: Even-toed Ungulates
- Range: Central and Western Africa, widespread throughout the Congo Basin from Senegal and Guinea east to South Sudan, Uganda, and Rwanda, and south to northern Angola and Zambia
- Habitat Type: Dense tropical moist lowland rainforests, montane cloud forests, gallery riverine belts, semi-deciduous forest mosaics, and swamp forests up to 3,000 meters elevation
- IUCN Red List Status: Near Threatened
- Lifespan: 10 to 12 years (up to 15 years in human care)
- Diet: Frugivorous/Herbivorous (fallen rainforest fruits, seeds, bark, leaves, shoots, fungi, and occasionally carrion or small invertebrates)
- Average Size/Weight: Head-and-body length 115 to 145 cm; shoulder height 65 to 80 cm; weight 45 to 80 kg (the largest duiker species in the world)
- Key Defining Feature: Colossal, high-rumped forest antelope with a dark charcoal-black coat, short conical horns, and a dramatic, erectile triangular patch of vivid golden-yellow hair on its lower back
Overview
The Yellow-backed Duiker (Cephalophus silvicultor) is the undisputed giant among Africa’s secretive forest duikers. Inhabiting the deep, shaded understory of the Congo Basin and West African rainforests, this formidable bovid weighs up to four times more than other duiker species. Easily identified by the bold, radiant triangular crest of silky golden-yellow fur on its rump—which can be flared vertically when alarmed—it is an essential seed disperser and a majestic icon of primary African rainforests.
Biology and Physical Characteristics
Cephalophus silvicultor has a heavy, compact, barrel-shaped body with an arched spine and noticeably higher rump, an anatomical adaptation that allows it to crash through dense jungle lianas and thorny undergrowth. The pelage is a glossy, dark brownish-black to charcoal-grey, broken across the lumbar and rump regions by a prominent triangle of long, coarse hair that starts whitish-yellow and deepens to vivid saffron-yellow. When the duiker is startled or agitated, specialized subcutaneous muscles contract to erect these yellow hairs into a shimmering vertical crest that flashes like a beacon in the dim forest. Both sexes possess short, sharp, cylindrical horns that curve gently backward, measuring 8 to 20 cm in length.
Behavior and Ecology
Yellow-backed Duikers are largely solitary and cathemeral, active during both day and night with activity peaks at dawn and dusk. They maintain large home ranges marked with oily secretions from large preorbital scent glands located just below the eyes. Endowed with powerful jaws and broad molars, they follow primates and hornbills through the forest to feed on heavy, thick-shelled fruits that drop from the high canopy. They also actively consume mineral-rich soils at forest salt licks and use their sharp hooves and horns to dig for subterranean tubers and roots.
Conservation and Human Impact
The Yellow-backed Duiker is evaluated as Near Threatened on the IUCN Red List. Due to its large body size and accessible meat, it is heavily targeted across Central and West Africa by commercial bushmeat poachers utilizing shotguns and wire snares. Accelerated deforestation, road construction, and industrial logging continue to fragment its primary rainforest strongholds, although stable populations survive within large protected areas such as Odzala-Kokoua and Lopé National Parks.
Interesting Factoid
When frightened by a leopard, the Yellow-backed Duiker raises its bright yellow back hairs into a blazing vertical ridge that flashes like a neon warning sign to startle the predator.