The Aders' duiker (Cephalophus adersi), also known as nunga in Swahili, kunga marara in Kipokomo, and harake in Giriama), is a small, forest-dwelling duiker found only in Zanzibar and a small coastal enclave in Kenya. It is also critically endangered. It may be a subspecies of the red, Harvey's, or Peters's duiker or a hybrid of a combination of these. It has a population of fewer than 1,400.