The Ruwenzori colobus (''Colobus angolensis ruwenzorii''), also known as Ruwenzori black-and-white colobus, is a

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

of the

Angola colobus The Angola colobus (''Colobus angolensis''), Angolan black-and-white colobus, or Angolan colobus is a primate species of Old World monkey belonging to the genus ''Colobus''. Taxonomy There are six recognized subspecies and one undescribed sub ...

. This

primate Primates are a diverse order of mammals. They are divided into the strepsirrhines, which include the lemurs, galagos, and lorisids, and the haplorhines, which include the tarsiers and the simians (monkeys and apes, the latter including huma ...

is distributed from the

Afromontane forest The Afromontane regions are subregions of the Afrotropical realm, one of the Earth's eight biogeographic realms, covering the plant and animal species found in the mountains of Africa and the southern Arabian Peninsula. The Afromontane regions ...

s of the

Ruwenzori Mountains The Ruwenzori, also spelled Rwenzori and Rwenjura, are a range of mountains in eastern equatorial Africa, located on the border between Uganda and the Democratic Republic of the Congo. The highest peak of the Ruwenzori reaches , and the range' ...

across the mountains in

Burundi Burundi (, ), officially the Republic of Burundi ( rn, Repuburika y’Uburundi ; Swahili language, Swahili: ''Jamuhuri ya Burundi''; French language, French: ''République du Burundi'' ), is a landlocked country in the Great Rift Valley at the ...

and

Rwanda Rwanda (; rw, u Rwanda ), officially the Republic of Rwanda, is a landlocked country in the Great Rift Valley of Central Africa, where the African Great Lakes region and Southeast Africa converge. Located a few degrees south of the Equator ...

to the northern shore of

Lake Tanganyika Lake Tanganyika () is an African Great Lake. It is the second-oldest freshwater lake in the world, the second-largest by volume, and the second-deepest, in all cases after Lake Baikal in Siberia. It is the world's longest freshwater lake. ...

Taxonomy

In 1901,

Oldfield Thomas Michael Rogers Oldfield Thomas (21 February 1858 – 16 June 1929) was a British zoologist. Career Thomas worked at the Natural History Museum on mammals, describing about 2,000 new species and subspecies for the first time. He was appoin ...

described two skins of Ruwenzori colobus

zoological specimen A zoological specimen is an animal or part of an animal preserved for scientific use. Various uses are: to verify the identity of a (species), to allow study, increase public knowledge of zoology. Zoological specimens are extremely diverse. Exampl ...

s that were collected at the northwestern slopes of the

in Bwamba Country of western Uganda. Thomas considered it a species using the scientific name ''Colobus ruwenzorii''.

Characteristics

The Ruwenzori colobus is black with hair on the shoulders between long. Its tail is also black and greyish-white at the end. It has white bushy tufts on the cheeks. The white hair on the forehead forms a crest.

Distribution and habitat

The Ruwenzori colobus occurs at Lake Nabugabo and Rwenzori Mountains National Park in

Uganda }), is a landlocked country in East Africa East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territor ...

. Troops of 300 to 400 individuals inhabit Rwanda's

Nyungwe National Park The Nyungwe Forest () is located in southwestern Rwanda, on the border with Burundi, where it is contiguous with the Kibira National Park to the south, and Lake Kivu and the Democratic Republic of the Congo to the west. The Nyungwe rainforest ...

. Some authors reports indicate that it perhaps also occurs in some

Tanzania Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; Comoro Islands and ...

n regions.

Ecology and behaviour

The Ruwenzori colobus is a highly arboreal and acrobatic leaf-eater. Its diet consists of about two thirds of leaves and one third of fruit and seeds. Although all ''Colobus'' species are very sociable, they usually move on the troops of several hundred animals.

References

{{Taxonbar, from=Q12758412 Mammals of Rwanda Mammals of Tanzania Subspecies Mammals described in 1901 Taxa named by Oldfield Thomas