The Nigeria-Cameroon, or Gulf of Guinea chimpanzee (Pan troglodytes vellerosus) is the most endangered currently recognized subspecies of chimpanzee in Africa. There are estimated to be between 5,000 and 10,000 individuals in Nigeria and western Cameroon. While there is an increasing body of knowledge on their taxonomy, genetics, morphology and distribution, relatively little is known of their ecology, behaviour, culture and conservation status - certainly compared to the other chimpanzee subspecies in Africa.