Map of Migration Routes (IMAGE) Columbia Climate School Caption GPS data revealed spring migration routes for 55 American robins. Analyzing the weather at locations along the flight paths revealed some of the environmental conditions that influence early migration. Credit Oliver et al, 2020 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.