![Erin Hooley 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)](https://mapi.associatedpress.com/v2/items/741284eaeb8d45889ad82370b6331b64/preview/preview.jpg?s=680x)
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)
![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)](https://mapi.associatedpress.com/v2/items/d7e811d165a24022a07d4220d409b698/preview/preview.jpg?s=680x)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/759e9239ac9049ed9b5b800fd748f692/preview/preview.jpg?s=680x)
Live cicadas swarm with exoskeletons on a tree at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/cd60179ad41e4e73a4cd65d904609e47/preview/preview.jpg?s=680x)
A blue-eyed cicada perches on a plant at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![Erin Hooley Cicadas perch on a tree at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)](https://mapi.associatedpress.com/v2/items/8b9481f8918c474dbfc8e1b023b22ee2/preview/preview.jpg?s=680x)
Cicadas perch on a tree at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/cc9526e2695046868b0786ab7d22dfdf/preview/preview.jpg?s=680x)
A young tree wears a protective net to ward off egg-laying cicadas Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/a32fc6120f2045859dc98075ffaa0bbe/preview/preview.jpg?s=680x)
A blue-eyed cicada is held inside an aquarium at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/6e1dd78599ea44abb59fafd92b92dd31/preview/preview.jpg?s=680x)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/e12faa4f7f794188ac6eb4f9bab9249a/preview/preview.jpg?s=680x)
A blue-eyed cicada perches on a flower at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![Erin Hooley Cicadas hang out on leaves at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)](https://mapi.associatedpress.com/v2/items/760aa4e4d5c449fe8ad6f72354bf174b/preview/preview.jpg?s=680x)
Cicadas hang out on leaves at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![Erin Hooley Live cicadas swarm with exoskeletons at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)](https://mapi.associatedpress.com/v2/items/5cca92f298964147b4a3b44b55f0cf6b/preview/preview.jpg?s=680x)
Live cicadas swarm with exoskeletons at the Morton Arboretum, Friday, May 24, 2024, in Lisle, Ill. (AP Photo/Erin Hooley)
![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)](https://mapi.associatedpress.com/v2/items/6ceeb50e0c3b436da298154e8ad8f231/preview/preview.jpg?s=680x)
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)