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S_USA.Periodical_Cicada_Brood

Active Periodical Cicada Broods of the United States. The periodical cicada emerges in massive groups once every 13 or 17 years and is completely unique to North America. There are 15 of these mass groups, called broods, of periodical cicadas in the United States. This county-based data, complied by USFS Northern Research Station entomologist Andrew Liebhold, depict where and when the different broods of periodical cicadas are likely to emerge in the US through 2030. The data was compiled for the publication by Koenig, et. al. (2011) using data from the following historic periodical cicada publications: Marlatt, C. L. 1907. The periodical cicada. Bulletin of the USDA Bureau of Entomology 71:1-181. Simon, C. 1988. Evolution of 13- and 17-year periodical cicadas (Homoptera: Cicadidae). Bulletin of the Entomological Society of America 34:163-176.