Pair-Bonded Titi Monkeys (IMAGE) University of California - Davis Caption Titi monkeys housed at the California National Primate Research Center form lifelong, monogamous pair bonds. A recent study investigated jealousy in pair-bonded primate species, offering insight into human behavior and emotions Credit K.West/CNPRC Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.