Facial expression in nonhuman animals

Bridget M. Waller, Jerome Micheletta

Research output: Contribution to journalArticlepeer-review


Many nonhuman animals produce facial expressions which sometimes bear clear resemblance to the facial expressions seen in humans. An understanding of this evolutionary continuity between species, and how this relates to social and ecological variables, can help elucidate the meaning, function, and evolution of facial expression. This aim, however, requires researchers to overcome the theoretical and methodological differences in how human and nonhuman facial expressions are approached. Here, we review the literature relating to nonhuman facial expressions and suggest future directions that could facilitate a better understanding of facial expression within an evolutionary context.
Original languageEnglish
Pages (from-to)54-59
Number of pages6
JournalEmotion Review
Issue number1
Publication statusPublished - Jan 2013


  • animal signals
  • communication
  • evolution
  • facial displays
  • multimodality
  • primates


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