A Geen Violet-Ear Hummingbird (IMAGE) NASA/Goddard Space Flight Center Caption A green violet-ear hummingbird flies in the Monte Verde cloud forest in Costa Rica. A new study by University at Buffalo and Yale University researchers finds that satellite observations of cloud cover can be used to map the boundaries of ecosystems such as cloud forests. Credit Photo courtesy of: Adam Wilson 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.