A suction trap deployed in Boone County. Each trap is a tower of PVC pipe sucking flying insects from the sky. Inside the suction trap is an electric fan that pulls air through it and down toward a funnel that directs the captured insects into a collection jar. Collecting jars are replaced each week, and the aphids are identified to species by David Voegtlin, Illinois Natural History Survey, Champaign, IL. (Marlin E. Rice)