A lone fruit fly (IMAGE) Rockefeller University Caption Fruit flies are social creatures. But when isolated, they begin to act differently—not unlike a human in quarantine. Credit Wahne Li Usage Restrictions Image may be only be used to illustrate research described in the accompanying release. License Original 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.