Crows Complete Basic 'Aesop's Fable' Task (IMAGE) PLOS Caption Crows understand water displacement at the level of a small child. Credit Sarah Jelbert Usage Restrictions CC-BY 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.