Brood XIX and Brood XIII of periodical cicadas are emerging across the Southeast and Midwest, creating a cacophony of noise with their distinctive mating calls. These two broods, with life cycles of 13 and 17 years respectively, have not been seen together since 1803. Residents in over a dozen states are witnessing the emergence of these noisy insects, marking a rare event for cicada enthusiasts.
As the soil reaches 64 degrees about 8 inches underground, the cicadas begin to emerge triggered by warm rain showers. With warm temperatures in many states, these insects have already been spotted above ground, continuing their life cycle that involves only a few weeks in adult form. Once the male and female cicadas mate and the females lay their eggs, the insects will die after a short period above ground.
Unlike annual cicadas, which emerge yearly, the periodical cicadas spend years underground before rising to the surface to complete their life cycle. The nymphs of periodical cicadas remain dormant underground for either 13 or 17 years, depending on their brood. After emerging as adults, the cicadas mate, lay eggs, and the cycle continues for the next generation of these fascinating insects.
This year’s cicadas are slated to die off by June, after spending a brief but noisy period above ground. Some may perish earlier or a bit later depending on when they first emerged. The last time these two broods emerged together was in 1803, adding to the intrigue and excitement surrounding this year’s cicada emergence. With their unique lifecycle and loud presence, periodical cicadas remain a fascinating natural spectacle for both scientists and enthusiasts alike.