Ogilby's duiker feeds on a variety of leaves, shoots, seeds and fruits, and, like other duikers, it may follow groups of fruit-eating birds and monkeys through the forest, feeding on dropped fruit. Perhaps surprisingly, duikers are also known to occasionally capture small birds and mammals. Duikers are thought to play an important ecological role in the forest as seed dispersers and as a significant part of the diet of predators such as leopards. Considered mainly diurnal, Ogilby's duiker, like other duikers, is likely to be found either alone or in pairs. Interestingly, no Ogilby's duikers are known to be kept in captivity. This, together with its secretive lifestyle and inaccessible habitat, means little is currently known about the biology of this elusive species. However, it is likely that Ogilby's duiker is monogamous, with a male and female occupying a relatively small home range. Female duikers typically bear a single calf, which remains well hidden in the vegetation for the first few weeks of life.