by While humans might take note of the emperor tamarin's distinctive mustache, its fellow emperor tamarins (Saguinus imperator) may have their eyes on something else: the tongue.
When these primates are displeased, they tend to flick their tongues, quickly moving the tongue in and out of the mouth, according to Apenheul Primate Park, a zoo in the Netherlands.
The emperor tamarin also communicates with shrill calls, chirps, hisses and facial expressions, which, combined with tongue flicking, help keep its troop together and alert to danger, according to the New England Primate Conservancy.
Source
When these primates are displeased, they tend to flick their tongues, quickly moving the tongue in and out of the mouth, according to Apenheul Primate Park, a zoo in the Netherlands.
The emperor tamarin also communicates with shrill calls, chirps, hisses and facial expressions, which, combined with tongue flicking, help keep its troop together and alert to danger, according to the New England Primate Conservancy.
Source
