Butterfly_2 (IMAGE) Florida Museum of Natural History Caption Biologists recently teamed up with park rangers in Ecuador's Yasuní National Park to document changes in butterfly abundance over long periods of time. Credit Keith Willmott Usage Restrictions Credit must be given to the creator. License CC BY 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.