The park is best known for the mountain gorilla (Gorilla beringei beringei). Other mammals include: golden monkey (Cercopithecus mitis kandti), black-fronted duiker (Cephalophus niger), buffalo (Syncerus caffer), spotted hyena (Crocuta crocuta) and bushbuck (Tragelaphus scriptus). The bushbuck population is estimated to be between 1760-7040 animals. There are also reported to be some elephants in the park, though these are now very rare. There are 178 recorded bird species, with at least 13 species and 16 subspecies endemic to the Virunga and Rwenzori Mountains.