Drosophila Activity Monitor (IMAGE) University of California - Santa Barbara Caption The "Drosophila Activity Monitor" automatically tracks an individual fly's activity over the circadian cycle by recording every time the animal crosses the infrared beam. Credit Peter Allen and Jinfei Ni Usage Restrictions None 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.