Communication
staring: This display by the gelada baboon is used as a threat display
The eyes are fixed on the stimulus and the eyebrows are raised and the scalp is retracted
the facial skin is also stretched by moving the ears back
Under the eye lids the color is different which contrasts sharply with the surrounding facial color
A starring Gelada baboon
staring with open mouth: This is the stare with the mouth being open, but the teeth are covered
This is a threat expression and often occurs with head-bobbing like a rocker going wild
head-bobbing: This is used as a threat display by the gelada baboon and head bobs up and down
This often occurs with staring with open mouth as seen above
tension yawning: This is done by an adult male gelada baboons
This is when the mouth is opened fully to reveal the canines(sharp teeth)
Happens when a rival group or a predator is approaching the community
lipsmacking: This is when the lips are protruded, then smacked together repeatedly.
lip-flip: This is a variation on the fear grimace which is an expression of fear
the mouth is open, and the upper lip is flipped up, as a result, the pink gums are showing
Gelada Baboons are lip flipping
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