Brood XIII was historically recorded in Michigan, and older maps (Marlatt 1923; Simon 1988) show intriguing populations following the Michigan/Indiana border. However, searches in 2007 failed to confirm the existence of these populations, although populations have recently been reported from counties surrounding the Michigan, Indiana, and Ohio shared border (Moore 2016).

Brood XIII also has one of the largest and best documented off-cycle or “straggling” emergence. In 1969, four years before the 1973 emergence, millions of cicadas emerged and formed choruses in the near western suburbs of Chicago (Dybas 1969). Subsequent searches of these areas have revealed significant numbers of off-cycle cicadas, including light choruses in 2003 (Cooley et al 2016).

In the map below, cicada symbols are verified records in our database as of February 2021. Gold symbols are from Simon (1988); smaller symbols are records with a lower degree of certainty, and crosses represent records that are considered spurious. Blue symbols are from Marlatt (1923); smaller symbols are records with a lower degree of certainty, and question marks represent records that are considered spurious. Symbols are in layered in the order Database, Simon, Marlatt, and symbols in the upper layers may obscure symbols in lower layers. This map may not be reproduced without written permission.

 

Illinois presents a particular challenge for understanding periodical cicada biology, because it contains both 13 and 17 year life cycles, all 7 currently recognized species, and five separate broods, some of which include disjunct populations.

Stannard (1975) published a map of all Illinois periodical cicada broods. Standard’s map of Brood XIII closely matches the distribution as currently understood, although some areas delineated as Brood XIII belong to Brood III.

In the map below, cicada symbols are verified records in our database as of February 2021. Closed circles are records of the brood from Stannard (1975); open circles represent absences of the brood. The shaded area represents Stannard’s estimation of the brood boundary. This map may not be reproduced without written permission.

Literature

Cooley, J. R., G. Kritsky, D. C. Marshall, K. B. R. Hill, G. J. Bunker, M. L. Neckermann, J. Yoshimura, J. E. Cooley, and C. Simon. 2016. A GIS-based map of periodical cicada Brood XIII in 2007, with notes on adjacent populations of Broods III and X (Hemiptera: Magicicada spp.). The American Entomologist 62:241-246.

Dybas, H. S. 1969. The 17-year cicada: A four year mistake? Bulletin of the Field Museum of Natural History 40:10-12.

Marlatt, C. L. 1923. The Periodical Cicada. United States Department of Agriculture, Bureau of Entomology Bulletin 71:1-183.

Moore, T. E. 2016. 17-Year cicadas in Michigan. Newsletter of the Michigan Entomological Society 61:32-34.

Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas. Bulletin of the Entomological Society of America 34:163-176.

Stannard, L. J. 1975. The distribution of periodical cicadas in Illinois. ll. Nat. Hist. Surv. Biol. Notes 91:3-12.