Common and Rare Species in Urban Parks (IMAGE) The University of Hong Kong Caption Chilades pandava (left) and Cyrestis thyodamas (right) are common and rare species in urban parks respectively. Credit The University of Hong Kong 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.