Light Pollution (IMAGE) Max-Planck-Gesellschaft Caption Too much light: Artificial lighting at night leads to the males of certain species of songbirds starting to sing earlier in the morning. At the same time, female blue tits start to build nests earlier while male blue tits allow themselves a bit on the side. Credit Image: Jan Kempenaers 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.