This duiker formerly occurred throughout the band of savanna woodlands that stretches across West and Central Africa from Senegal and The Gambia to the Nile Valley (East 1999; Kingdon and Hoffmann in press). Formerly widespread in north-western Uganda, as far east as the Albert Nile (East 1999); a small relic population was discovered in the Bugungu G.R., immediately south of the Murchison Falls N.P. (Allan 1996).