The cicadas that emerge together in the same year are collectively called a brood. These maps identify the approximate locations where each of the 15 present-day broods emerge. The brood maps combine the data of C. L. Marlatt (1923), C. Simon (1988), and unpublished data. Broods I-XIV represent 17-year cicadas; the remaining broods emerge in 13-year cycles. Each map can be clicked for a larger view.
These brood maps are used by permission of Dr. John Cooley, with credit to the Department of Ecology and Evolutionary Biology, University of Connecticut and the University of Michigan Museum of Zoology.
Brood I (The Blue Ridge Brood)
The Blue Ridge Brood occurs primarily in the upland areas of the Blue Ridge Mountains. The present-day populations live in West Virginia and Virginia. Brood I emerged most recently in 1995.
Future Brood I Emergences: 2012, 2029, 2046, 2063, 2080, 2097
The cicadas of Brood II inhabit a large area, with populations in Connecticut, New York, New Jersey, Pennsylvania, Maryland, Virginia, and North Carolina. Brood II last appeared in 1996.
Future Brood II Emergences: 2013, 2030, 2047, 2064, 2081, 2098
Brood III (The Iowan Brood)
As you would predict, the Iowan Brood lives primarily in Iowa. However, some Brood III populations also occur in Illinois and Missouri. Brood III emerged in 1997.
Future Brood III Emergences: 2014, 2031, 2048, 2065, 2082, 2099
Brood IV (The Kansan Brood)
The Kansan Brood, despite its name, covers six states: Iowa, Nebraska, Kansas, Missouri, Oklahoma, and Texas. Brood IV nymphs made their way above ground in 1998.
Future Brood IV Emergences: 2015, 2032, 2049, 2066, 2083, 2100
Brood V cicadas appear mostly in eastern Ohio and West Virginia. Documented emergences also occur in Maryland, Pennsylvania, and Virginia, but are limited to small areas along the borders of OH and WV. Brood V appeared in 1999.
Future Brood V Emergences: 2016, 2033, 2050, 2067, 2084, 2101
Cicadas of Brood VI live in the western third of North Carolina, the westernmost tip of South Carolina, and in a small northeastern area of Georgia. Historically, Brood VI populations were believed to emerge in Wisconsin as well, but this could not be confirmed during the last emergence year. Brood VI last emerged in 2000.
Future Brood VI Emergences: 2017, 2034, 2051, 2068, 2085, 2102
Brood VII (The Onondaga Brood)
Brood VII cicadas occupy the land of the Onondaga nation in upstate New York. The brood consists only of the species Magicicada septedecim, unlike most other broods that include three different species. In 2001, Brood VII emerged.
Future Brood VII Emergences: 2018, 2035, 2052, 2069, 2086, 2103
Cicadas of Brood VIII emerge in the easternmost portion of Ohio, the western end of Pennsylvania, and the tiny strip of West Virginia between them. People in this area of the country saw Brood VII cicadas in 2002.
Future Brood VIII Emergences: 2019, 2036, 2053, 2070, 2087, 2104
Brood IX cicadas appear in western Virginia, and in the adjacent portions of West Virginia and North Carolina. These cicadas emerged in 2003.
Future Brood IX Emergences: 2020, 2037, 2054, 2071, 2088, 2105
Brood X (The Great Eastern Brood)
As its nickname suggests, Brood X covers large areas of the eastern U.S., emerging in three distinct regions. A large emergence occurs in New York (Long Island), New Jersey, Pennsylvania, West Virginia, Delaware, Maryland, and Virginia. A second cluster appears in Indiana, Ohio, small areas of Michigan and Illinois, and possibly Kentucky. A third, smaller group emerges in North Carolina, Tennessee, Georgia, and westernmost Virginia. Brood X appeared in 2004.
Future Brood X Emergences: 2021, 2038, 2055, 2072, 2089, 2106