Jentink's duikers have long, thin horns, which curl back a little at the ends, and reach between 14 and 21 cm (5.5 and 8.3 in).

Jentink's duikers live mainly in very thick rainforest, where they eat fruit, flowers, and leaves which have fallen from the canopy, as well as stems of seedlings, roots, and, to the annoyance of local farmers, palm nuts, mangos, and cocoa pods.

They are nocturnal and shelter during the day in dense thickets, or buttress roots, apparently in pairs.

Jentink's duikers are reported to be territorial animals, and when frightened, will run very quickly, but wear themselves out easily.

[7] In 2012, Anne R. Johnston (of the University of Orleans) and colleagues constructed a cladogram of the subfamily Cephalophinae (duiker) based on mitochondrial analysis.