CHICAGO — Southern Illinois has been recently invaded by a peculiar and alarming phenomenon: a sexually transmitted disease that turns cicadas into “zombies,” causing their reproductive organs to fall off. This strange infection, caused by the white fungus Massospora cicadina, has begun its northern journey and is expected to reach the Chicago area within weeks.
Massospora cicadina is a parasitic fungus that exclusively targets 13- and 17-year periodical cicadas. Once infected, male cicadas undergo a gruesome transformation. The fungus overtakes their bodies, causing their gonads to disintegrate and fall off. The infected cicadas then release chalky spores that can spread the infection to other cicadas in close proximity, perpetuating the cycle.
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Jim Louderman, a collections assistant at Chicago’s Field Museum of Natural History, has been closely monitoring the spread of this infection. He reports that the fungus has already been detected in Champaign, Illinois, and predicts its inevitable migration northward to the Chicago area. This alarming progression raises concerns about the impact on the local cicada populations and the broader ecological consequences.
The infected cicadas, driven by the fungus, exhibit a range of abnormal behaviors, earning them the moniker “zombie cicadas.” These insects become hyperactive and continue to mate despite the loss of their reproductive organs. This behavior facilitates the spread of Massospora cicadina, ensuring the fungus’s survival and propagation.
Interestingly, the impact of this fungus extends beyond the cicada population. Birds that consume infected cicadas experience hallucinatory effects due to the psychoactive compounds produced by the fungus. This creates a ripple effect in the food chain, potentially altering the behavior of local bird populations and their interactions with other species.
Northern Illinois is currently witnessing the emergence of Brood XIII cicadas, which were last seen in 2007. These periodical cicadas are part of a remarkable natural cycle, spending 13 or 17 years underground before emerging en masse to reproduce. In central and southern Illinois, Brood XIX is making its appearance. The simultaneous emergence of these two broods is a rare event, last occurring in 1803 when Thomas Jefferson was president.
The arrival of billions of cicadas is a spectacle in itself. Their buzzing and clicking sounds create a cacophony that can be heard for miles. This natural event, while fascinating, now carries the additional intrigue of the Massospora cicadina infection. The visual and auditory display of cicadas is juxtaposed with the hidden horror of the fungal infection spreading among them.
The spread of Massospora cicadina raises several ecological and scientific questions. Researchers are keen to understand the long-term effects of the fungus on cicada populations and the broader ecosystem. Cicadas play a crucial role in aerating the soil and providing a food source for various predators. A significant decline in their population could disrupt these ecological processes.
Efforts are underway to study and document the spread of Massospora cicadina. Scientists are particularly interested in the fungus’s lifecycle, its interaction with cicadas, and the mechanisms behind the hallucinogenic effects on birds. Understanding these aspects could provide insights into managing the spread of the infection and mitigating its impact on local ecosystems.

For residents of the Chicago area, the impending arrival of infected cicadas adds a layer of curiosity and caution. While the sight of billions of cicadas emerging is a rare and remarkable natural event, the knowledge of the lurking fungal infection adds an element of unease. Observers are encouraged to watch and appreciate the cicadas from a distance, avoiding direct contact to prevent the accidental spread of the fungus.
As the summer progresses, the story of Massospora cicadina and its zombie cicadas will continue to unfold. This bizarre and macabre phenomenon serves as a reminder of the intricate and sometimes unsettling relationships within nature. It highlights the importance of scientific research in understanding and responding to ecological changes, ensuring that we can appreciate the wonders of the natural world while also protecting its delicate balance.
In conclusion, the emergence of cicadas in Illinois, coupled with the spread of Massospora cicadina, presents a unique and intriguing scenario. While the visual and auditory spectacle of cicadas is a testament to nature’s wonders, the underlying fungal infection adds a layer of complexity and concern. As scientists and residents alike observe this unfolding drama, it underscores the importance of vigilance and understanding in the face of nature’s ever-evolving mysteries.