Scaly-Breasted Lorikeet (IMAGE) University of Chicago Press Journals Caption Parrots have a big brain and are also one of the most evolutionarily diversified bird clades. Credit Daniel Sol Usage Restrictions credit to Daniel Sol 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.