Human Face Stimuli (IMAGE) University of Iowa Health Care Caption University of Iowa researchers found that pigeons recognize a human face's identity and emotional expression in much the same way as people do. Image shows example of face stimuli shown to the pigeons in the experiments conducted by Soto and Wasserman. Credit Journal of Vision Usage Restrictions For permission to reuse image, contact Gary Galluzzo at 319-384-0009 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.