The 
                  rock and tree hyraxes are a group of herviborous animals living 
                  in rocky outcrops of west central Africa. All have uique foot 
                  structures that provide a firm grip on the rocks and trees in 
                  which they live. Heterohyrax and Procavia are terrestrial and 
                  live in colonies of 6 to 50 individuals in areas of jumbled 
                  boulders and rock outcrops. Dendrohyrax live in the trees. 
                 
                
                
                Family 
                  Procaviidae
                
                
                 
                
                
                See 
                  "Walker's Mammals of the World" (fifth edition), by 
                  Ronald M. Nowak, Published in 1991 in Baltimore and London by 
                  the Johns Hopkins University Press.