I¿M BOSS NOW: Mukiza became a dominant silverback at the relatively young age of 16, but looks very confident here. He and Rukara split the group, but you could say Mukiza got the best of the deal, because four females chose to stay with him, while only three went with Rukara. Right now, Mukiza¿s group has more adult gorillas and more females. A male gorilla may decide to leave without a fight. Even if they are bigger and stronger, they might decide not to risk injury and so strike out on their own.