DistributionRead full entry
Range DescriptionThis species ranges from northern Angola north to the Congo-Oubangui river system, and then eastwards (with a disjunct range) to the montane and coastal forests of Tanzania and Kenya. Recorded to 2,415 m asl in Kenya (Anderson et al. 2007).
There are six described subspecies.
C. a. angolensis ranges from Angola north to the great bend of the Congo River.
C. a. cottoni occurs from north-east of the River Congo, east to Lake Albert and north to the Uele-Oubangui river system (this subspecies forms a hybrid zone with C. a. ruwenzorii in the south of its range).
The subspecies C. a. ruwenzorii ranges along both sides of the western Rift, from the Semiliki Valley and the Rwenzori Mountains through south-eastern Uganda, Rwanda, Mount Kahuzi (Democratic Republic of the Congo) and Burundi to the eastern shores of Lake Tanganyika in Tanzania.
C. a. cordieri is present in the Democratic Republic of the Congo where it occurs between the Lowa and Luama rivers from the Lualaba River in the west to close to Lake Kivu in the east, where it forms a hybrid zone with C. a. ruwenzorii.
The subspecies C. a. prigoginei is endemic to Mount Kabobo, in the eastern Democratic Republic of the Congo.
The eastern subspecies, C. a. palliatus, is discontinously distributed in the Southern Highlands and coastal and gallery forests of southern and eastern Tanzania and south-eastern Kenya. Kenyan distribution of C. a. palliatus is solely restricted to the southern coastal forests of the Kwale District (Anderson et al. 2007).
An isolated, undescribed subspecies is present on Mount Nkungwe and adjacent uplands in the Mahale Mountains of western Tanzania.