The tree hyraxes or tree dassies are the two species in the genus Dendrohyrax. They are mammals in the family Procaviidae (the only living family within the order Hyracoidea). The two species are: Southern tree hyrax (Dendrohyrax arboreus), found in East and Southern Africa Western tree hyrax (Dendrohyrax dorsalis), found in West and Central AfricaThe tree hyrax is a small nocturnal mammal that is distantly related to elephants and sea cows.