This species ranges from The Gambia and Senegal, just north of the Casamance River, through West Africa to the River Volta.

There are two subspecies: C. c. campbelli ranges from The Gambia in the west to the River Cavally, on the Liberia-Côte d'Ivoire border, while C. c. lowei is found from the River Cavally (Côte d'Ivoire) in the west to the River Volta, Ghana in the east. The former subspecies is also known from the island of Caravela in the Bijagos Archipelago of Guinea-Bissau (Gippoliti and Dell'Omo 2003).