Gorillas sometimes beat their chests. But why do they do this, and what does it mean when you see a gorilla beating its chest?
Mountain gorillas usually beat their chests when they sense a threat or danger. When a gorilla beats its chest, it may be a sign that it is getting ready to charge at a human or another gorilla.
Chest-beating is one of the warning signs that a gorilla might attack, so it is important to stay away from its space when this happens.
Chest-Beating as a Sign of Victory and Strength
Gorillas also beat their chests as a sign of victory, especially after a fight. It can also be a way for a male gorilla to show strength and attract females.
This display is one reason chest-beating carries so much weight within a group. It functions as both a warning and a form of self-presentation, letting other gorillas, and rival males in particular, know that a silverback is confident in his position.
Chest-Beating as Communication
Sometimes, chest-beating is used as a way to communicate, especially by silverbacks. A silverback might beat his chest and then walk away, which is a signal for the group to follow him.
Silverback gorillas may also beat their chests if a younger silverback tries to challenge them. The chest-beating acts as a warning, and it may lead to the younger gorilla backing down or starting a fight.
This kind of exchange is a normal part of gorilla social life, and it is one of the reasons trekking guides pay close attention to a group’s behavior throughout a visit, since chest-beating between two silverbacks can signal that tension is building within or between families.
Other Ways Gorillas Communicate
Gorillas use many ways to send messages or warnings. These include loud sounds, grunts, tearing or throwing plants, roars, hooting, laughing, sticking out their tongues, and stamping their feet hard on the ground.
All these behaviors help gorillas communicate. Communication is very important in their group life, during mating, and in keeping order in the group.
What This Means for Trekkers
For anyone trekking mountain gorillas in Uganda, Rwanda, or Congo, understanding chest-beating and other warning signs is part of what makes the experience safe. Guides brief every trekking group beforehand and watch closely for these behaviors during the visit, stepping in to guide visitors on how to react if a gorilla becomes agitated. Staying calm, following instructions, and giving the gorillas space when these signals appear helps keep both visitors and the gorillas safe throughout the encounter. Ready to see this behavior for yourself? Check out our gorilla tours.
