A Moth Warms Up (IMAGE) University of Utah Caption These images from an infrared video show a moth's increasing temperature -- turning from purple to red to orange and yellow -- as it shivers to warm up its flight muscles. A University of Utah study found that when naive male moths are exposed to female sex attractant, they start shivering faster to warm up, but then take off prematurely before they can attain maximum flight power. Credit José Crespo, University of Utah 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.