C. o. brookei (Brooke's Duiker) ranges in Sierra Leone, south-east Guinea, Liberia, southern Côte d’Ivoire and Ghana, west of the Volta River;
The nominate subspecies occurs on Bioko Island, and then on the mainland in south-east Nigeria and south-west Cameroon;
The white-legged form of Ogilby’s Duiker, C. o. crusalbum, occurs in Gabon, mostly south of the Ogooué River, and is reported to occur in north-west Republic of Congo.
Habitat and Ecology
On Bioko, the species is not only present in lowland forest but also in the island’s montane forest (perhaps to elevations exceeding 2,000 m) and in the higher altitude Schefflera forest zone, habitats which are normally occupied by other duiker species on the mainland (East 1999).
Molecular Biology and Genetics
Barcode data: Cephalophus ogilbyi
Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.
See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
Statistics of barcoding coverage: Cephalophus ogilbyi
Public Records: 1
Specimens with Barcodes: 2
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
- 1994Vulnerable(Groombridge 1994)
- 1990Vulnerable(IUCN 1990)
The mainland population of the nominate subspecies has only a few remaining strongholds, e.g., Korup National Park (Cameroon) and Cross River N.P. (Nigeria); it has also been recorded from several forest reserves (Forboseh et al. 2007). It remains relatively numerous on Bioko Island (Equatorial Guinea). The effective protection of the Gran Caldera de Luba Scientific Reserve is crucial to the survival of this species on Bioko Island.
The distinctive White-legged Duiker is now known to be relatively widespread and numerous in Gabon, including protected areas such as Lope and the Gamba complex, and Odzala N. P. (Congo).
Listed on CITES Appendix II.
Ogilby's duiker (Cephalophus ogilbyi), is a small antelope found in Sierra Leone, Liberia, Ghana, southeastern Nigeria, Equatorial Guinea's Bioko Island, and, possibly, Gabon. No subspecies are recognized.
Ogilby's duikers weigh up to 20 kg (44 lb) and have a shoulder height of up to 56 cm (22 in). They vary in color from chestnut to mahogany to deep brown, and have massive hindquarters typical of duikers.
Ogilby's duikers live mainly in high-altitude rainforests, where they feed mainly on fallen fruit.
The total population is estimated at 12,000 individuals.
- IUCN SSC Antelope Specialist Group (2008). Cephalophus ogilbyi. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 29 March 2009. Database entry includes a brief justification of why this species is of least concern.
- Colin Peter Groves & Peter Grubb: Ungulate Taxonomy, Johns Hopkins University Press, 2011. ISBN 978-142-140-093-8