Cicada Mania

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April 18, 2020

Brood XIII (13) will emerge in 2024 in Illinois, Iowa, Wisconsin and Indiana

Filed under: Brood XIII,Magicicada,Periodical — Dan @ 1:02 am

Some Brood XIII “stragglers” may emerge early in 2020. If you see a cicada and want to report it, the Cicada Safari App is available for Android and Apple devices 📱.

Some Brood XIII cicadas are emerging 4 years early, particularly in the Chicago area in 2020. Blue in the map below:

May 30 map - Now with Brood V

Periodical cicada Brood XIII (13) will emerge in the spring of 2024 in Iowa, Wisconsin, Illinois, Indiana, and possibly Michigan. The last time this brood emerged was in 2007.

Special note: Brood XIX (19) will also emerge in 2024.

What, when, where, and why:


Millions of these:
Adult, Nymph, Molting Cicada

  • Cicada insects with a 17-year life cycle.
  • Some people call them “locusts” but they’re really cicadas.
  • Which species: All three 17-year species, Magicicada septendecim, Magicicada cassini and Magicicada septendecula. How to tell the difference between the species.
  • NOT the green ones that arrive annually.

When: Typically beginning in mid-May and ending in late June. These cicadas will begin to emerge approximately when the soil 8″ beneath the ground reaches 64 degrees Fahrenheit. A nice, warm rain will often trigger an emergence.

Other tips: these cicadas will emerge after the trees have grown leaves, and, by my own observation, around the same time Iris flowers bloom.

Where: has the most up to date maps.

  • Illinois places: Belvidere, Brookfield, Channahon, Chicago, Des Plaines River Trail, Downers Grove, Elmhurst, Flossmoor, Geneva, Glen Ellyn, Highland Park, Hinsdale , Homewood, La Grange , Lagrange Woods, Lake Forest, Lansing, Lincolnshire, Lisle, Lombard, MacArthur Woods Forest Preserve, Marseilles, McHenry, McKinley Woods, Morton Arboretum, Naperville, Northbrook, Ogden, Ottawa, Palos Heights, River Forest , River Grove, Romeoville, Schiller Park, Thornton, Vernon Hills, Villa Park, Weaton, Western Springs, Westmont, Wonder Lake, and more.
  • Illinois counties: Bureau, Carroll, Cass, Cook, DuPage, Fulton, Grundy, Henderson, Henry, Jo Daviess, Kankakee, Lake, LaSalle, Livingston, Logan, Marshall, Mason, McHenry, McLean, Menard, Peoria, Putnam, Sangamon, Stark, Tazewell, Whiteside, Will, Winnebago, Woodford.
  • Iowa places: Atalissa, Solon, and more.
  • Iowa counties: Benton, Black Hawk, Bremer, Cedar, Dubuque, Henry, Iowa, Johnson, Jones, Linn, Louisa, Muscatine, Scott, Tama.
  • Wisconsin places: Aurora University, Big Foot Beach State Park, Lake Geneva, Moraine Nature Preserve, and more.
  • Wisconsin counties: Crawford, Grant, Green. Rock, Walworth.
  • Indiana places: Crown Point, Portage, Purdue-North Central, Valparaiso, and more.
  • Indiana counties: LaPorte, Porter, Lake.
  • Michigan: According to, Magicicada have been found along the border of Michigan and Indiana.

More Location Tips:

Why: Why do they stay underground for 17-years? The prevailing research suggests they’ve evolved a long, 17-year lifecycle to avoid predators that can sync up with their lifecycle & emergence. Why are there so many?! Research suggests that their huge numbers allow them to overwhelm predators, so enough of them will live on to breed and perpetuate the brood.

More facts and fun:

1907 Map from Marlatt, C.L.. 1907. The periodical cicada. Washington, D.C. : U.S. Dept. of Agriculture, Bureau of Entomology.

See a modern map, or the Live Map from the Cicada Safari app.
Marlatt 1907 13 Brood XIII


  1. Late Sleeper says:

    They’re coming up tonight in Beverly, on the south side of Chicago. They have red eyes – they’re our little friends, but four years early! So far the emergence doesn’t seem as overwhelming as the normal 17-year ones have been. If this is a split of Brood 13, then I assume they won’t be as outrageously loud as normal. We’ll know in a week.

  2. P.B. says:

    This past weekend (5/31/20), we’ve seen the small nymphs on the sidewalks and on all the trees. We also see the emerged adults everywhere in LaGrange, IL.

  3. Curtis Willmore says:

    I’ve noticed several of the small nymph husks recently, and today (29may2020) I found several emerged adults in my yard. I live in Elmhurst IL, which is known to have a population on this time cycle.

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