Yellow-Backed Duiker

The yellow‑backed duiker (Cephalophus silvicultor) is a medium‑sized antelope belonging to the family Bovidae and the subfamily Cephalophinae. It inhabits the dense, humid forests of West and Central Africa, ranging from Sierra Leone and Liberia eastward through Ghana, Nigeria, Cameroon, the Congo Basin, and into the Democratic Republic of the Congo. Preferring primary rainforest, it also occupies secondary growth, forest‑savanna mosaics, and riparian thickets where understory vegetation is abundant. Its name derives from the distinctive yellowish stripe that runs along the dorsal midline, contrasting with the darker brown to reddish coat. The species is primarily nocturnal and crepuscular, relying on keen hearing and a compact, agile body to navigate thick leaf litter. Although classified as Least Concern by the IUCN, populations are fragmented and show a declining trend due to habitat loss and hunting pressure. Conservation actions focus on protected‑area management, anti‑poaching patrols, and community‑based sustainable use programs.

Yellow‑backed duikers are largely solitary, with adult males maintaining overlapping home ranges that intersect those of several females. They are most active at dawn and dusk, when they forage on the forest floor, but may also be seen moving quietly during the night. Territories are marked by scent glands located on the preorbital region and by occasional scrapes made with the hooves. Communication includes low grunts, snorts, and a series of rapid foot‑stomps used to signal alarm to nearby conspecifics. When threatened, individuals freeze, relying on their cryptic coloration, or bolt into dense undergrowth, often leaping over obstacles up to 1.5 m high. Social interactions are limited to brief mating encounters and occasional mother‑offspring bonding during the first few months after birth.

The yellow‑backed duiker is a strict herbivore with a strong preference for fruits, seeds, and young leaves, classifying it as a frugivore‑browser. Studies in the Congo Basin show that up to 70 % of its diet consists of fallen fruit, especially figs (Ficus spp.), mangoes, and palm nuts, while the remainder includes herbaceous shoots, bark, and occasional fungi. Daily intake averages 1.5–2 % of body weight, roughly 0.5–0.8 kg of material, obtained by foraging on the forest floor and low vegetation. The species uses its keen sense of smell to locate ripe fruit and may travel up to 2 km each night in search of food patches. Seasonal fluctuations in fruit availability lead to increased browsing on leaves and bark during the dry season, demonstrating dietary flexibility that aids survival in fragmented habitats.

Females reach sexual maturity at about 12–14 months, while males mature slightly later, around 18 months. Breeding is not strictly seasonal but peaks during the rainy season (April–June) when food resources are abundant. After a gestation period of approximately 225 days, a single fawn is born, weighing 1.5–2 kg. Births occur in concealed thickets, and the newborn is hidden for the first 2–3 weeks while the mother forages nearby. The fawn is precocial, standing within hours and beginning to nibble on fallen leaves and fruits. Maternal care continues for 8–10 months, after which the juvenile becomes independent. Longevity in the wild averages 10–12 years, with occasional individuals living longer in protected reserves.

The IUCN lists the yellow‑backed duiker as Least Concern, but its population is estimated to have declined by 20–30 % over the past three decades. Primary threats include unsustainable bushmeat hunting, which accounts for an estimated 5–10 % of the total harvest in West African forest markets, and habitat loss from logging, agricultural expansion, and mining activities. Fragmentation reduces connectivity between subpopulations, increasing vulnerability to local extinctions. Climate change may further alter fruiting phenology, affecting food availability. Conservation measures focus on strengthening law enforcement against illegal hunting, expanding protected‑area networks, and promoting community‑based wildlife management schemes that provide alternative protein sources and income. Current population estimates suggest 500,000–800,000 mature individuals across its range, but reliable surveys are lacking in many regions.

• The yellow‑backed duiker’s dorsal stripe is unique among duikers and helps researchers identify individuals in camera‑trap studies.
• It can leap up to 1.5 m vertically to escape predators or navigate dense underbrush.
• Despite its small size, it can consume up to 30 % of its body weight in fruit during peak fruiting periods.
• Its preorbital scent glands produce a musky odor used for territory marking and individual recognition.
• In some local cultures, the duiker’s meat is considered a delicacy, leading to targeted hunting during festive seasons.