Dung Beetle Light (IMAGE) University of the Witwatersrand Caption Dung beetles can use the colour gradients of the sky during the day to orientate themselves while navigating. A green light is used in an experiment to mimic the position of the sun during a certain time of the day. Credit Chris Collinridge/Wits University 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.