For example, males will fix their eyes on a target when they feel there is an immediate threat. The Mona monkey moves its ears with the muscles that they have developed to be able to stretch out the facial skin. This is what they call the staring method, Along with that method, the species use their mouths as another form of signaling the social group. By opening their mouths, yet showing no teeth communicates that there is an even a greater threat to the pack (Grzimek 1990, Kingdon 1974, Nowak 1999, Zoo Atlanta
For example, males will fix their eyes on a target when they feel there is an immediate threat. The Mona monkey moves its ears with the muscles that they have developed to be able to stretch out the facial skin. This is what they call the staring method, Along with that method, the species use their mouths as another form of signaling the social group. By opening their mouths, yet showing no teeth communicates that there is an even a greater threat to the pack (Grzimek 1990, Kingdon 1974, Nowak 1999, Zoo Atlanta