The Next Emergence?
The 17 year cicada broods in the Chicagoland area apparently emerged four years early, in 1969. It then returned to a seventeen-year cycle. In 1986 and 2003, the smaller division emerged. This sub-brood emerges throughout much of the Cook County suburbs, the eastern half of DuPage County, southeastern Lake County, and northeastern Will County. The emergence is a curved band running from Deerfield on the northeast, arcing to Addison and Lisle on the west and Crete on the southeast. The inside of the band arcs across northwestern, western, and southwestern Chicago. Its territory is not as large as the main brood which will emerge in the spring of 2007. The main hatch will be heavier in number and cover a much larger territory.
