Eretis lugens, the savanna elf, is a butterfly in the Hesperiidae family. It is found in Senegal, northern Guinea, northern Sierra Leone, Liberia, northern Ivory Coast, Ghana, Togo, Benin, Nigeria, Cameroon, the Central African Republic, Angola, the Democratic Republic of the Congo, southern Sudan, Ethiopia, Uganda, Burundi, Kenya, Tanzania and north-western Zambia. The habitat consists of Sudan savanna, open Guinea savanna, forest margins, forests and dense woodland.