The socioecology of the black mangabey (Cercocebus aterrimus) near Lake Tumba, Zaire

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Abstract
Socioecological data were gathered in a two‐year study of black mangabey monkeys in a secondary forest on the west bank of Lake Tumba, Zaire. The mangabeys of the study area lived in multi‐male, multi‐female groups numbering between 14 and 19 individuals. They were completely arboreal, fed mostly on fruit and nuts, and frequently were associated with other species of arboreal monkeys. Their predators were human hunters and the crowned hawk‐eagle. The primary vocalizations of black mangabeys were analyzed and their social contexts compared with those of closely related gray‐cheeked mangabeys, to which they were found to be very similar.