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June 18, 2014

Brood III, The Iowan Brood, Will Emerge in 2014

Filed under: Brood III,Magicicada,Periodical — Dan @ 1:03 am

Magicicada Brood III (3), the Iowan Brood, will emerge in Iowa, Illinois, and Missouri, in the spring of 2014.

Update for 6/18: It has been great to see so many people are enjoying the emergence. I bolded the names of the counties below, where people have reported emergences in the comments.

Update for 5/31: Cicadas have been reported in Dallas, Union, and Warren counties in Iowa, and Mercer county in Missouri.

Update for 5/30: Greg Holmes reported on the Entomological-Cicadidae Yahoo Group that Donald Lewis, entomologist at Iowa State University, has a report of periodical cicadas from north of Burlington, IA. With air temperatures in the mid 80s for the next 6 days, the soil should be warm enough to coax more cicadas from the ground. Rain may slow the emergence, though.

Some Brood III facts:

  • Brood III Magicicadas have a 17-year life cycle.
  • The last time Brood III emerged was 1997.
  • All three 17-year species will emerge: M. septendecim, M. cassini, and M. septendecula.

Brood III Map - next emergence 2014

Looking a the Cicada Central Magicicada Database:

  • Iowa will likely experience Brood III in Appanoose, Boone, Decatur, Des Moines, Hamilton, Henry, Lee, Louisa, Lucas, Mahaska, Van Buren, Washington counties.
  • There are literature records (typically older, and not substantiated by recent evidence) that the cicadas will also emerge in the counties: Adair, Adams, Audubon, Cass, Cedar, Davis, Greene, Guthrie, Iowa, Jasper, Jefferson, Johnson, Keokuk, Madison, Marion, Marshall, Monroe, Muscatine, Polk, Poweshiek, Ringgold, Story, Taylor, Union, Wapello, Warren, Wayne and Webster.
  • Plus reports from Clarke, Dallas County!
  • Missouri literature records: Adair, Harrison, Harrison, Henry, Johnson, Lewis, Macon, Marion, Platte, Putnam,Vernon
  • Illinois: Adams, Brown, Cass, Fulton, Hancock, Henderson, Knox, McDonough, Peoria, Pike, Schuyler, Warren, and maybe (literature records) Champaign, Greene, and Mason.


  1. They are all over backyard today 2014/06/21 in Knoxville, IA (Marion County). Just notices them. If they were out last week did not notice them. Kids are having fun catching them.

    Comment by Jon — June 21, 2014 @ 12:15 pm

  2. Still going strong here in Wapello Co.(Ottumwa)!

    Comment by jen strong — June 21, 2014 @ 1:31 pm

  3. Started hearing them early part of last week after Father’s day. Collected some from my apple tree yesterday the 21st here in McDonough Co.,IL. There seems to be more of them now as we hit the upper 80’s temp the last few days.

    Comment by Joseph — June 22, 2014 @ 11:30 am

  4. 6/23/14 They are thick along the DSM river in Boone County, Iowa. Careful because the river is flooding but you can drive near the river and get out and hear them.
    Also Jester park near Granger cicadas are thick.

    Comment by Caree — June 23, 2014 @ 3:15 am

  5. I live in the country between menlo and stuart iowa,and i have thousands of these loud annoying insects here,i would like to know how long they will be here,they have already been here for 2 weeks,they are driving me crazy..You cant even be outside without having them all over you and the noise is so loud they sound like they are in my house…..When will they be gone?????

    Comment by sherrie — June 23, 2014 @ 12:30 pm

  6. Soon enough Sherrie. They usually finish up within a 3 to 4 week period.

    Comment by Dan — June 23, 2014 @ 4:00 pm

  7. I’ve just landed in Iowa City and am looking for some cicada action … Anything still happening? I’d love to take a drive to hear something.

    Comment by Alan Boyle — June 29, 2014 @ 8:37 am

  8. Alan, I just left SW Iowa today after finishing gathering data points in the corner of the brood from I-35 in Missouri just north of Bethany to Hwy 2 at Mt Ayr. Cassini was by far the dominant sound with weak to very occasionally strong choruses within that area. I heard almost no septendecim or septendecula. That’s quite a change from when I was in south central and SE Iowa on the 18th, 19th and 20th, at which time septendecim was strong. This was my third Brood III trip this month but I didn’t go near Iowa City since I was only concerned with helping map the south edges of the brood and the SW part to see if it overlaps Brood IV next year. The areas closest to Iowa city where I saw dense concentrations eleven days ago were Shimek State Park and Fort Madison’s Rodeo Park but I’m sure you can find a Magicicada fix closer than that. Please let us know what you find.

    Comment by Greg Holmes — June 30, 2014 @ 1:50 am

  9. I live in rural Marion county, for the last three weeks the cidcades have been very noisy and lots of them, they seem to be eating certain plants in my garden like zucchini, cabbage, broccoli, also my hostas and zinnas. Is there any thing I can do to stop them from destroying my plants?

    Comment by Janet Shinn — June 30, 2014 @ 7:02 am

  10. These cicadas don’t have chewing mouthparts, so they won’t eat your veggies. They will climb all over them though. They can be removed with a garden hose.

    Comment by Dan — July 3, 2014 @ 6:42 am

  11. I received a photo and a reliable report that some M cassini were still alive on July 10, 2014 at Camp Mitigwa, south of Ledges State Park, Iowa. Although my source (a police officer with whom I networked while in Iowa) said there are many dead cicadas around, I found it a bit surprising there were any alive at all this far into July.

    Comment by Greg Holmes — July 14, 2014 @ 3:37 am

  12. I live in a small desert village, Borrego Spring, CA. At dusk last eve in a eucalyptus tree outside of our tiny post office, the cicada songs were nearly deafening outside our small post office. I loved it as it brought back memories from childhood. Grew up on a farm Iowa. I enjoyed your informative site.

    Comment by Ellen Dickman — August 2, 2014 @ 2:27 pm

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