Gull Microsensor (IMAGE) Max-Planck-Gesellschaft Caption Microsensors are attached to the gulls' legs, transmitting data to the researchers on the birds' swimming phases. Credit MPI for Ornithology 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.