This forest-dwelling species is primarily montane and sub-montane but also occurs in lowlands. There is some evidence that C. attila is able to persist in degraded habitats.

This species occurs from the Cameroon Mountains to eastern Democratic Republic of the Congo. It is known from several localities in the Cameroon Mountains, Medje in the Democratic Republic of the Congo and in eastern Nigeria. C. attila is primarily a montane species but it is probably also present in lowland areas. Within Medge it occurs below 1,000 m asl in hilly terrain but all other known localities are above 1,500 m asl. The highest recorded altitude for this species is 1,900 m asl in the Gotel Mountains. Although it has not yet been recorded it is likely that this species also occurs in the Central African Republic.

Although there are no direct conservation measures in place, this species may occur in areas of small reserves in the Cameroon Mountains. Further studies are needed into the distribution, abundance, reproduction and ecology of this species.