Say it with your chest! Bigger silverback gorillas make deeper noises when they beat their chest

Silverback gorillas stand up and beat their chest as a form of communication, a study has found. 
Analysis of wild male mountain gorillas in Rwanda reveals a male's drumming noise conveys how big they are and also their identity.  
German researchers found larger gorillas make a deeper noise when smacking their chest than their smaller peers and each individual's thwacking pattern is unique. 
It is thought that when silverbacks hit their muscular torsos they are broadcasting their dominance and size to rival males while simultaneously trying to impress females who may be potential mates. 
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German researchers found bigger gorillas make a deeper noise than their smaller peers and each individual's thwacking pattern is unique

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