*Rescheduled from June 23* When the sun sets and darkness settles on the Arboretum for the night, every now and then the dark is interrupted by the flash of a firefly. Join Professor Adam South of Tufts University for an evening Firefly Walk to learn about the lives of the fireflies that live here, the mechanics of how they light up, and how these unique insects are being impacted by pesticides and light pollution.