Behavior

Gorillas usually build a fresh sleeping nest from vegetation. Learn where they sleep, how nests are made and how scientists use nests to study populations.

Gorillas communicate with vocalizations, intentional gestures, facial expressions, touch and displays. Explore what these signals mean—and their limits.

Gorillas live in cohesive social groups built around lasting relationships. Learn how silverbacks, females, infants and dispersing gorillas shape group life.

Short answer: Gorilla chest beating is a visual and acoustic signal. Research on wild mountain gorillas shows that larger adult males produce lower-frequency chest beats, so the sound can communicate body size. Chest beats may help gorillas assess rivals, attract mates and manage encounters without immediate physical fighting. Last fact-checked: August 2026. Findings about signal…