Watercolor Image 15" x 22"; Framed: 22" x 28" Photo taken by Eric Nadal/Natalie Sheh December 2002. Mgahinga Gorilla National Park Two silverbacks in a family of 15 gorillas. He appears very much aware of how one young male was approaching Natalie. Uganda. The Nyakagezi Group consisted of 15 members, including 2 silverbacks which is unusual. Only six tourists can be taken into the Park each day to view the gorillas.