Fruit Fly Antennae (IMAGE) University of Washington Caption Fruit flies use their antennae, the two pill shaped bumps sticking out from the front of the head, to detect odors. Credit Floris van Breugel Usage Restrictions Credit required 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.