Campbell's mona monkey

Campbell's mona monkey, Cercopithecus campbelli, also known as Campbell's guenon or Campbell's monkey, is a guenon of the family Cercopithecidae found across the western end of Africa, from Senegal and the Gambia through Guinea-Bissau, Guinea, Sierra Leone and Liberia to the Cavally River on the border with Ivory Coast, and on the island of Caravela off Guinea-Bissau. It was named for Henry Dundas Campbell in 1838, and Lowe's mona monkey was once counted as one of its subspecies. The species lives in lowland primary and secondary forest, gallery forest, mangrove swamps, farmland and scrub. Groups of about eight animals are sociable and territorial, and at dawn and dusk the dominant male booms from a high perch, with other males answering. Its calls show a rudimentary syntax. It feeds mostly on wild and cultivated fruit, with seeds, invertebrates, grubs, small amphibians and lizards. The IUCN rates it near threatened.