http://www.newsweek.com/cicada-parasitic-fungus-bugs-mate-spread-1594266

As periodical cicadas emerge from the ground across the eastern U.S., some might be infected by a bizarre parasitic fungus that hijacks the brains of the insects, manipulating them so that they try and mate like crazy.

Periodical cicadas are seven species from the genus Magicicada that emerge from the ground every 13 or 17 years in North America. The cicadas that will burst from the ground in 2021 are referred to as "Brood X."