Gregg Kulma, right, of Denver, and Bill Kibler of Joliet observe hundreds of cicadas on a tree at Morton Arboretum Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
Live cicadas swarm with exoskeletons on a tree at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A blue-eyed cicada perches on a plant at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
Cicadas perch on a tree at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A young tree wears a protective net to ward off egg-laying cicadas Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A blue-eyed cicada is held inside an aquarium at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
Cicadas hang out on leaves at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
Live cicadas swarm with exoskeletons at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
Plant Health Care Lead Stephanie Adams of the Morton Arboretum shows the female cicada's egg-laying ovipositor, which can damage young trees, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)