Brood III

The Iowan Brood

17-year Brood III, the Iowan Brood, emerges in Missouri, Iowa and north western Illinois. In many areas, it is in close contact with 13-year Brood XIX.

Brood III
Brown symbols are verified records in the Database in February 2017. Gold are from Simon (1988). Blue symbols are from Marlatt (1923). Smaller symbols are records with a lower degree of certainty, and question marks or open symbols (on top of other symbols or alone) 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.
Standard Illinois Map
Figure 5 from Stannard (1975).

Stannard (1975) published a map of all Illinois periodical cicada broods.  Standard’s map shows an eastern disjunct of Brood III in DeWitt, Piatt, and Champaign Counties.  However, these populations occupy a more restricted area and belong to 13-year Brood XXIII.

Standard Illinois Map
Orange shaded areas are the limits of the brood as depicted in Standard (1975). Black symbols are verified records of the brood in the database as of February 2017.


Cooley, J. R., D. C. Marshall, A. F. Richards, R. D. Alexander, M. D. Irwin, J. R. Coelho, and C. Simon. 2013. The distribution of periodical cicada Brood III in 1997, with special emphasis on Illinois (Hemiptera: Magicicada spp.). The American Entomologist 59:9-14.

Irwin, M. D., and J. R. Coelho. 2000. Distribution of the Iowan Brood of periodical cicadas (Homoptera: Cicadidae: Magicicada spp.) in Illinois. Annals Of The Entomological Society Of America 93:82-89.

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

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.