Brood XIII

Brood XIII

Brood XIII (also known as Brood 13 or Northern Illinois Brood) is one of 15 separate broods of periodical cicadas that appear regularly throughout the midwestern United States. Every 17 years, Brood XIII tunnels "en masse" to the surface of the ground, lays eggs, and then dies off in several weeks.

Although entomologist C. L. Marlatt published an account in 1907 in which he argued for the existence of 30 broods, over the years a number have been consolidated and only 15 are recognized today as being distinct. [http://www.inhs.uiuc.edu/highlights/periodicalCicada.html] Brood XIII is among the 12 different broods with 17-year cycles.

Its last appearance was in the spring and early summer of 1990 throughout an area roughly enclosed by northern Illinois, eastern Iowa, southern Wisconsin, and a narrow strip of Indiana bordering Lake Michigan and Michigan. It emerged in (2007), and will emerge again in 2024 and 2041. [http://www.ummz.lsa.umich.edu/magicicada/Periodical/BroodXIII.html] [http://buzz.ifas.ufl.edu/g900a.htm]

"The 1 1/2 inch long black bugs do not sting or bite. Once they emerge, they spend their short two-week lives climbing trees, shedding their crunchy skins and reproducing. They can number up to several hundred thousand per acre." [http://www.chicagotribune.com/news/local/chi-070313cicadas,1,5278420.story]

Ravinia

In the northern Chicago suburb of Highland Park, there was a concern about how the cicadas might drown out the music at the Ravinia Festival during May and June, the peak months of cicada activity. According to the "Chicago Tribune", Ravinia adjusted the schedule so that Chicago Symphony Orchestra (CSO) concerts took place in July, after the outbreak in 2007. Other concerts before this time could have been moved indoors if the noise of the cicadas would have detracted from the music. However, the dates of all concerts, except those for the CSO, took place as scheduled. [http://www.chicagotribune.com/news/local/chi-070313cicadas,1,5278420.story]

Gallery

ee also

*Magicicada

Bibliography

*Moore, Thomas, "Singing Insects of North America", University of Florida [http://buzz.ifas.ufl.edu/g900m17y.htm map]
* Post, Susan L. "The Trill of a Life Time", photographs by Michael R. Jeffords, "The Illinois Steward", Spring 2004. [http://www.inhs.uiuc.edu/highlights/periodicalCicada.html]
* Stannard, Jr., Lewis. "The Distribution of Periodical Cicadas in Illinois", 1975.

External links

* "Video depicting Magicada life cycle (excellent)" [http://www.youtube.com/watch?v=6I3CNnLdnQc&eurl=]
* "Cicada Mania" [http://www.cicadamania.com/cicadas/]
*More, Thomas, "Singing Insects of North America", University of Florida [http://buzz.ifas.ufl.edu/g900m17y.htm map]
* Post, Susan L. "The Trill of a Life Time", photographs by Michael R. Jeffords, "The Illinois Steward", Spring 2004. [http://www.inhs.uiuc.edu/highlights/periodicalCicada.html]
* "Ravinia Surrenders to Cicadas", "Chicago Tribune", May 13, 2007 [http://www.chicagotribune.com/news/local/chi-070313cicadas,1,5278420.story]
* "Ravinia Taking Concerts Indoors Due to Cicadas" "CBS2Chicago", March 13, 2007. [http://cbs2chicago.com/local/local_story_072094250.html]
* Siegel, Robert, "Cicadas' Return Worries Festival Organizer", "All Things Considered", National Public Radio, March 14, 2007. Report on possible sound conflicts between the cicadas and concerts at Ravinia. Interview with Welz Kauffman, CEO of Ravinia. [http://www.npr.org/templates/story/story.php?storyId=8904400]


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