Brood X cicadas emerged across the Eastern United States in May 2021 after spending 17 years underground. The synchronized arrival of billions of loud, red-eyed insects created a spectacle that fascinated, annoyed, and inspired memes nationwide.
The Emergence
Brood X (Brood 10):
- Largest of 15 US periodical cicada broods
- 17-year lifecycle
- Previous emergences: 2004, 1987, 1970
- Covered 15 states from Georgia to Michigan
- Billions of insects emerged simultaneously
Biological Marvel
The cicada strategy:
- Overwhelming predators with sheer numbers
- Synchronized emergence ensures survival
- 90+ decibel mating calls
- 4-6 week above-ground lifespan
- Die after mating, leaving eggs in trees
Public Reaction
Americans responded with:
- Awe at natural phenomenon
- Annoyance at constant noise
- Concern about pets eating them
- Creative cuisine (cicada recipes went viral)
- Countless memes and jokes
Cultural Moment
The emergence became:
- Metaphor for pandemic emergence
- Content gold for nature accounts
- Educational moment about lifecycles
- Weird 2021 highlight
Regional Impact
Affected areas experienced:
- Deafening outdoor noise
- Crunchy sidewalks
- Tree damage concerns
- Tourism boost (cicada tours)
- Temporary outdoor dining challenges
Scientific Interest
Researchers studied:
- Climate change impact on emergence timing
- Population counts
- Genetic analysis
- Ecosystem effects
Next Emergence
Brood X will return in 2038—a generational event for those who witnessed 2021.