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A Brood X cicada on a tree in Kickapoo State Recreation area near Danville on June 10, 2021.  (E. Jason Wambsgans/Chicago Tribune)
A Brood X cicada on a tree in Kickapoo State Recreation area near Danville on June 10, 2021. (E. Jason Wambsgans/Chicago Tribune)

They’re loud, but they’re harmless. And some people even like to eat them.

Cicadas are beginning to emerge from the ground around Chicagoland and Illinois. Two broods will converge on the state in a historic emergence. They belong to Brood XIX, four species that appear every 13 years in the Southeast, and Brood XIII, three species that appear every 17 years in northern Illinois.

It will be the first time in 221 years that these two specific broods come above ground at the same time and in such proximity. The last time this happened was in 1803 when Thomas Jefferson was president, and Illinois had yet to become a state.

Depending on where you live in Illinois, the cicadas could be a minor annoyance or a big deal. The 13-year brood is in southern Illinois while the 17-year brood is in northern Illinois.

“While there will be billions of cicadas emerging across the country, there won’t be three-inch piles of them,” said Jamie Viebach, horticulture educator for the University of Illinois Extension in Naperville.

Here’s what to know about the 2024 historic cicada emergence — and take a look back at how the Tribune has covered past cicada emergences.

After a 17-year wait, cicadas emerge a little early in Chicagoland: ‘It’s a milestone’

A Brood XIII cicada excretes a fluid as it flies off three-year-old Fennec Van Schaik's hand in the 10700 block of South Longwood Drive in the Beverly neighborhood Saturday, May 18, 2024, in Chicago. Fennec's family drove from Stratford, Ontario to experience the emergence of cicadas in Chicago and central Illinois. (John J. Kim/Chicago Tribune)
A Brood XIII cicada excretes a fluid as it flies off three-year-old Fennec Van Schaik’s hand in the 10700 block of South Longwood Drive in the Beverly neighborhood Saturday, May 18, 2024, in Chicago. Fennec’s family drove from Stratford, Ontario to experience the emergence of cicadas in Chicago and central Illinois. (John J. Kim/Chicago Tribune)

It’s official, Chicagoland. Periodical cicadas have arrived.

The large insects, which last emerged in the area 17 years ago, have been spotted in droves in pockets of the city and suburbs. On certain streets on the Far Southwest Side Saturday, cicadas dotted the sidewalks and blanketed the trees. Read more here.

Illinois will soon be cicada central when 2 broods converge on state in historic emergence

A Brood XIII cicada waits for its wings and new exoskeleton to dry and harden after climbing and molting on a tree in a front yard in Homewood in 2007. (E. Jason Wambsgans/Chicago Tribune)
A Brood XIII cicada waits for its wings and new exoskeleton to dry and harden after climbing and molting on a tree in a front yard in Homewood in 2007. (E. Jason Wambsgans/Chicago Tribune)

Periodical cicadas exist in only two other countries: One species emerges in the islands of Fiji every eight years, and another one — the “World Cup cicada” — emerges every four years in northeast India, coinciding with the international soccer tournament. Read more here.

Illinois cicadas, loud but harmless, expected to make historic emergence in mid- to late May

Stephanie Adams, Plant Health Care Leader, displays 17 year old cicada nymphs, and a chimney, at the Morton Arboretum in Lisle on April 30, 2024. Hundreds of young and vulnerable trees are being covered in fine-mesh netting at the Morton Arboretum to protect them from the imminent cicada emergence. (Antonio Perez/Chicago Tribune)
Stephanie Adams, plant health care leader, displays 17-year-old cicada nymphs, and a chimney, at the Morton Arboretum in Lisle on April 30, 2024. Hundreds of young and vulnerable trees are being covered in fine-mesh netting at the arboretum to protect them from the imminent cicada emergence. (Antonio Perez/Chicago Tribune)

Experts consider this year unusual because two broods are co-emerging in neighboring areas in Illinois for the first time in more than two centuries.

“With the weather we’ve been having, there’s some concern that they’re going to be emerging earlier,” Lake Forest College professor Sean Menke said. “And we’re hearing reports from people that they’re finding the tunnel(s) that they dig in the Chicago suburbs.” Read more here.

Yes, cicadas are coming but nothing like the deluge expected in southern Illinois

Cicadas are mostly harmless insects that can only do harm if they choose to lay their eggs in the smaller, newer branches of young trees, which can do a lot of damage from which they can't recover, according to Jamie Viebach, horticulture educator for the University of Illinois Extension in Naperville. (Ken Johnson/Illinois Extension)
Cicadas are mostly harmless insects that can only do harm if they choose to lay their eggs in the smaller, newer branches of young trees, which can do a lot of damage from which they can’t recover, according to Jamie Viebach, horticulture educator for the University of Illinois Extension in Naperville. (Ken Johnson/Illinois Extension)

There’s been a lot of buzz about the unusual emergence of two broods of cicadas in one year, a phenomenon already underway in southern parts of the country and soon be happening in Illinois.

So, yes, there will be a lot of the critters around to make noise this summer, but not necessarily in this area so no need to fear an apocalyptic event here, experts say.

“While there will be billions of cicadas emerging across the country, there won’t be three-inch piles of them,” Viebach said. Read more here.

One in a million blue-eyed cicada found in southwest suburbs

Kelly Simkins, who owns Merlin's Rockin' Pet Show, found this blue-eyed cicada on a tree in the Orland Grasslands Forest Preserve. (Photo provided by Kelly Simkins)
Photo provided by Kelly Simkins
Kelly Simkins, who owns Merlin’s Rockin’ Pet Show, found this blue-eyed cicada on a tree in the Orland Grasslands Forest Preserve. (Kelly Simkins)

Blue-eyed cicadas are the feature of an “extremely rare” genetic mutation that is found in “one in a million” or even fewer cicadas, explained Dr. Mary Carrington, a plant ecologist who was a biology professor at Governors State University and is the interim dean for the university’s College of Graduate Studies. Read more here.

Vintage Chicago Tribune: Cicada invasion

Andrew Moore, of Warrenville, tastes cicadas that his dad, Kirk, battered and fried on May 25, 2007. (Antonio Perez/Chicago Tribune)
Andrew Moore, of Warrenville, tastes cicadas that his dad, Kirk, battered and fried on May 25, 2007. (Antonio Perez/Chicago Tribune)

How did locals handle 17-year cicada invasions of years past? Here’s a look at what we found in the Tribune archives.

Naperville mom and daughter create a fairy oasis for respite-seeking cicadas

Cicadas sit in a habitat sanctuary that Naperville mother and daughter Stephanie and Fiona Tarrant created for the insects as Illinois' historic double emergence gets underway. (Tess Kenny/Naperville Sun)
Cicadas sit in a habitat sanctuary that Naperville mother and daughter Stephanie and Fiona Tarrant created for the insects as Illinois’ historic double emergence gets underway. (Tess Kenny/Naperville Sun)

For the insects lucky enough to appear on the front lawn of Stephanie and Fiona Tarrant’s Naperville home, that’s what awaits them: a bonafide cicada oasis. The mother and daughter have created a small habitat so the bugs can take a load off before they enjoy the rest of their weeks-long lifespans. Read more here.

The bugs are coming! If a cicada invasion sounds familiar, thank Hollywood

Movie poster for the 1954 disaster flick "Them!" (LMPC via Getty Images)
Movie poster for the 1954 disaster flick “Them!” (LMPC via Getty Images)

The bug, any bug, as Hollywood has taught for generations, is an unknowable, unstoppable menace, autonomous and so rich in fecundity, it outpaces man’s ability to truly eradicate. Read more here.

Protect your young trees from incoming cicadas

Horticulturist Rachelle Frosch demonstrates how to gently place fine-mesh netting around young and or vulnerable trees, during a news conference at Morton Arboretum in Lisle on April 30, 2024. (Antonio Perez/Chicago Tribune)
Horticulturist Rachelle Frosch demonstrates how to gently place fine-mesh netting around young and or vulnerable trees, during a news conference at Morton Arboretum in Lisle on April 30, 2024. (Antonio Perez/Chicago Tribune)

Cicadas will be most abundant in areas with mature trees. New developments and places where there has been soil-disturbing construction in the last 17 years will likely see fewer cicadas.

The only plants that may be vulnerable to cicada damage are young, newly planted trees and some shrubs. “Female cicadas make slits in small twigs and branches to lay their eggs,” said Sharon Yiesla, plant knowledge specialist at The Morton Arboretum, the large tree-focused public garden in Lisle. “On a very young tree, small twigs and branches may be all it has.” Read more here.

Park Ridge man’s cicada Facebook group amasses 27,000 members

A Brood XIII cicada in the Beverly neighborhood Saturday, May 18, 2024, in Chicago. The cicadas are populating trees, plants and lawns throughout the neighborhood. (John J. Kim/Chicago Tribune)
A Brood XIII cicada in the Beverly neighborhood, May 18, 2024, in Chicago. The cicadas are populating trees, plants and lawns throughout the neighborhood. (John J. Kim/Chicago Tribune)

They’re out, about, and crawling, and according to one Park Ridge man taste like boiled asparagus.

That’s one of the messages that Joel Reiser of Park Ridge is spreading about cicadas on his public Facebook group, Illinois Cicada Watch. He said the group was intended for his friends and family but has now amassed over 27,000 members. Read more here.

You may not be able to escape cicadas — but you can eat them

Pan-fried periodical cicadas, harvested just after molting, are served on June 4, 2021, in Hyattsville, Maryland. (Chip Somodevilla/Getty)
Pan-fried periodical cicadas, harvested just after molting, are served on June 4, 2021, in Hyattsville, Maryland. (Chip Somodevilla/Getty)

Insect cuisine is something “we should encourage,” said Maureen Turcatel, collection manager of insects at Chicago’s Field Museum of Natural History. Eating insects, she tells us, is “a very easy way to get a good source of protein” that doesn’t require a lot of resources. Read more here.

Cicadas are protein so why not cook up one or two for the heck of it?

Zach Lemann, curator of animal collections for the Audubon Insectarium, prepared cicadas for eating in April at the insectarium in New Orleans. The insectarium plans to demonstrate ways to cook cicadas at the little in-house snack bar where it already serves other insect dishes. If you are feeling adventurous, looking to add more protein to your diet and aren’t allergic to shellfish, the imminent emergence of cicadas presents a culinary opportunity for you. Read more here.