This species occurs in scattered populations in isolated forest patches within south-western Nigeria (both west and east of the Niger River within the delta region) and southern Bénin (perhaps as far as Banon at 8°29' N) (Campbell et al. 2008) with a western limit up to the Kouffo River. Campbell et al. (2008) tentatively suggested its presence in the Dahomey Gap in the Togodo Forest in Togo, and subsequent survey work has confirmed this record (G. Nobime et al. unpubl.).

There are two subspecies: C. e. erythrogaster ranges from southern Benin, including the Forêt Classé de Lama (see Sinsin et al. 2002 for review), and C. e. pococki is known from Nigeria.