Goats (Capra aegagrus hircus) have the ability to recognize the emotional state of other familiar goats just by viewing pictures of them! Since goats are social animals, facial expressions might be a major mode of communication between individuals.
[Photo by Nick Chudeau and caption by Maggie Creamer]
Bellegarde, L. G., Haskell, M. J., Duvaux-Ponter, C., Weiss, A., Boissy, A., & Erhard, H. W. (2017). Face-based perception of emotions in dairy goats. Applied Animal Behaviour Science, 193, 51-59.