Brood XIX

It is also notable because it includes four different 13-year species, one of which was discovered in Brood XIX in 1998 by scientists listening to cicada songs.

[5][6] The two species M. tredecim and M. neotredecim have an unusual geographical relationship in Brood XIX, with only a slight overlap between them, in a narrow band from northern Arkansas to southern Indiana.

[6] In early May 2011, cicadas began emerging throughout an area roughly enclosed by Georgia, Texas, Alabama, North Carolina, Missouri, and Tennessee.

[12] By June 8, 2011, a North Carolina newspaper reported that adult cicadas, which typically live for about a month, were dying en masse.

Nymphs from eggs that have been laid by Brood XIX females emerged from the earth again in 2024, restarting the cycle.

However, the two broods did not overlap except in a thin area in central and eastern Illinois (Macon, Sangamon, Livingston, and Logan counties).