Damage to baobab / Boab by elephant (Adansonia digitata). Ngulia Black Rhino Sanctuary in Kenya?s Tsavo West National Park. Ngulia 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 kms protected by a solar powered electric fence, numbers have increased to over 70 individuals (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.