Food for Flight (IMAGE) USDA Forest Service ‑ Southern Research Station Caption Monarch butterflies rely on fall-blooming flowers during their long migration. Credit Photo by Jerry A. Payne, USDA Agricultural Research Service, from Forestry Images Usage Restrictions Restrictions to commercial use per Forestry Images Web site. 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.