This species occurs from Sierra Leone to Togo , from south-eastern Niger to C.A.R. and former Zaire and as far south as north Angola . A distribution map was obtained from Haltenorth & Diller (1980) and updated using country maps in East (1988, 1989, 1990), as suggested by Dr. R. East ( 23 June '97 ). No geographic references were found to point out the possibility of occurrence of the species in Guinea Bissau as indicated by R. East.
This nocturnal creature lives in the heart of tropical forests. It is usually solitary or in pairs, and it spends the day hidden in dense vegetation beneath old tree trunks or in tangled bushes. It moves easily through the dense undergrowth along paths, which resemble tunnels through the undergrowth. The head is generally held low, which an adaptation to life in dense vegetation. Because of the bay duiker's secretive habits, it is difficult to observe, and therefore little is known about its behavior.
Categorical-discrete (CD) distribution model
Mainly found in lowland rainforest. Also reported to inhabit forest patches and gallery forests within the savanna woodland zone (Kingdon, 1997; East, 1988; 1990).