Here is what they posted on Science 360: “The NSF-funded Riffell laboratory at the University of Washington is studying how insect pollinators use their sense of smell to locate and perceive important flowers. Furthermore, this work is examining how insects locate flowers amidst a melange of background scents that can obscure, or mask, the scent of the flower from the pollinator. Image credit: Kiley Riffell Photography for Riffell Lab”