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Range DescriptionHarvey's Duiker occurs in central and south-eastern Kenya, north-eastern and central Tanzania, marginally in southern Somalia, and northern Malawi; there is a single record from Zambia (Kingdon and Rovero in press).
In Ethiopia an expedition to the Harenna forest in the southern part of Bale Mountains National Park in 1986 produced positive sightings of a red duiker. This was the first confirmed sighting of a Cephalophus duiker from Ethiopia. There has also been a subsequent sighting of this duiker in the same area. While identification of the species awaits confirmation, it is considered highly likely to be Harveys Duiker. This species occurs in southern Somalia and could have entered the Bale forests up the Juba and Genale valleys, a route which has been used by forest primates. In 1996, the presence of an unidentified species of red duiker was confirmed in dense bush around and north of the headquarters of Omo National Park in the south-west. The Omo population could be Weyns duiker (C. weynsi), which occurs in the lmatong Mountains of south-eastern Sudan 400 km to the south-west, but is here treated as an isolated population of C. harveyi (following East 1999, Wilson 2001 and Kingdon and Rovero in press).