The Gabon black colobus occurs in a number of protected areas, including Dja and Douala-Edea Reserves in Cameroon, Lopé National Park, Gabon, Monte Alen National Park in Equatorial Guinea, and the Gamba Reserve complex in Gabon (3) (5) (10) (11). The Bioko black colobus population is found entirely within two protected areas on Bioko Island, Pico Basile National Park and the Gran Caldera and Southern Highlands Scientific Reserve. However, these areas may offer little actual protection (5), and the subspecies is reported to have undergone the largest decline of all primates on the island, now being rare outside the Gran Caldera (1) (12). In 1986, the IUCN/SSC Primate Specialist Group compiled an Action Plan for African Primate Conservation in which a number of measures were outlined for the conservation of the black colobus. This plan was revised and the conservation recommendations reviewed in a 1996 publication. Further actions suggested included continued efforts to survey and develop the Dja Reserve and fully protect a core area of the Lopé Reserve. In addition, it was recommended that a management plan was developed for the Gamba Reserve complex, which included measures to reduce the impact of oil exploration occurring in the area (3). Working with local people in Bioko Island to find alternatives to bushmeat is also an urgent priority (7), to ensure the continued survival of the endangered Bioko black colobus.