Blackbird (IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption Artificial light increases foraging time in blackbirds. Birds in city centers are active not just considerably earlier, but also for longer than their relatives in darker parts of the city. Credit Photo: André Künzelmann, UFZ 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.