Do monkeys make facial expressions to communicate?

Yes, monkeys absolutely do make facial expressions to communicate! They use a wide variety of expressions, many of which are similar to human expressions, to convey emotions like:

* Happiness: Smiling, relaxed lips, and open eyes.

* Fear: Wide eyes, open mouth, and sometimes a furrowed brow.

* Anger: Lip retraction, teeth bared, and sometimes a furrowed brow.

* Sadness: Depressed facial muscles, downturned lips, and closed eyes.

* Surprise: Wide eyes, open mouth, and raised eyebrows.

Additionally, they use facial expressions for:

* Social communication: To signal dominance, submission, or interest in mating.

* Threat displays: To warn other monkeys of potential danger.

* Grooming: To show affection and build social bonds.

* Food solicitation: To communicate their desire for food.

While the exact meaning of some expressions may vary across monkey species, facial communication is an important part of their social lives. They use a complex combination of facial expressions, vocalizations, and body language to communicate effectively.