Carla Possamai_499 (IMAGE) University of Wisconsin-Madison Caption A northern muriquis sits on a branch in the sunlight. Strier and her team have spent years documenting the unique colorings and patterns of the monkeys’ faces to be able to identify each individual. Credit Carla Possamai Usage Restrictions None License Original 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.