Tourist vehicle at entrance gate to Ngulia Rhino Sanctuary. Tsavo National Park West is a protected stronghold for the highly endangered Black or Hook-lipped Rhinoceros which is now a CITES Appendix 1 listed species. From the original three rhinos captured from the Tsavo West area, a further three, then 15 more were introduced from the Nairobi National Park population. Now covering an area of 67 kilometers protected by a solar powered electric fence, numbers have increased to over 70 individuals as of March 2006. Around 5 new calves are born every year. Unfortunately numbers of elephant and buffalo are also increasing in the sanctuary and are beginning to threaten availability of water and also damaging the vegetation.