The gorillas are perfectly capable of making it clear when they don’t wish to be disturbed. There was one occasion on which a gorilla group had had a particularly stressful morning as a result of an encounter with another gorilla group, and the last thing they wanted was to be bothered with humans in the afternoon, so when a tracker brought some tourists and overstayed his welcome, the silverback took hold of the tracker’s hand and gently bit his watch off.
