Communication and Perception
Two forms of communication used in this species have already been discussed. First, vocal communication, involving the morning duets of mated pairs, are very important in establishing territories and pair bonds. The neck sack of both sexes acts as a resonating chamber to amplify these calls, and makes siamangs look somewhat frog-like.
In addition to vocal communication, these animals use tactile communication. Grooming and physical aggression are two examples.
All primates use visual signals, such as facial expressions, body postures and gestures in their communication.
Communication Channels: visual ; tactile ; acoustic
Other Communication Modes: duets
Perception Channels: visual ; acoustic
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