For Monarchs to Fly North, First They've Got to Chill (image) Cell Press Share Print E-Mail Caption A spring remigrant looks tattered and torn for the long journey back north. Credit Current Biology, Guerra et al. Usage Restrictions Credit Required Share Print E-Mail 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.