Bird on Perch (IMAGE) Stanford University Caption Graduate student Marc E. Deetjen trains a parrotlet to fly between perches. Credit L.A. Cicero Usage Restrictions Image may only be used with appropriate caption or credit 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.