The Window acraea (Acraea oncaea) is a butterfly of the Nymphalidae family. It is found in KwaZulu-Natal, Transvaal, Zimbabwe, Mozambique, from eastern Africa to Abyssinia and in Congo. The wingspan is 40–48 mm for males and 43–55 mm for females. Adults are on the wing year round, with a peak from September to May. There are multiple generations per year. The larvae feed on Xylotheca kraussiana, Tricliceras longipedunculatum and Passifloraceae species, including Adenia species.