Mule deer (IMAGE) University of Wyoming Caption Mule deer in temperate landscapes live in a seasonal cycle of feast or famine, putting on fat during spring migration and burning it off through the winter. Research at the University of Wyoming found that drought reshuffles the green-up of plants across habitats, dramatically shortening the annual foraging bonanza that mule deer rely on. Credit Tayler LaSharr 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.