At least 10 primate species occur in Bwindi, including mountain gorilla, chimpanzee, olive baboon, black-and-white colobus, red-tailed monkey and L’Hoest’s monkey. The only representative of the Big Five is a population of seldom-seen elephants (DNA analysis of spoor indicates they are mostly critically endangered forest elephants). Bushbuck and various forest duikers can sometimes be spotted. Bwindi has very impressive bird and butterfly checklists. Another special is the 30cm/1ft-long Rwenzori three-horned chameleon, a striking Albertine Rift endemic.