Jeffrey Riffell, University of Washington (IMAGE) University of Washington Caption University of Washington's Jeffrey Riffell makes use of food-storage bags to collect the scent from flowers of an agave, a plant not preferred by moths but one they can learn to visit because of its abundant nectar. Credit U of Washington Usage Restrictions Credit required 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.