06/13/2021
The park would like some scouts at 5 pm
They are here! Brood X (10 in Roman numerals) is the largest brood of 17-year cicadas. They are insects that belong to the order Hemiptera (true bugs.) This brood is found in three areas centering around Pennsylvania and northern Virginia, Indiana, and eastern Tennessee.
What’s interesting about cicadas, besides that they live for long periods of time underground and only appear above ground for a short period, some broods have developed different cycles. In the United States there are over a dozen specific broods. Some are the 17-year cicadas, some have 13-year cycles, and there is an annual cicada species that hatch every year (they are green.)
When they appear depends on when the ground temperature reaches 64 degrees. It was predicted that they would begin the first or second week in May and then be gone by the end of June. By coming out in large numbers, all of their predators (birds, racoons, opossums, foxes, mice, shrews, frogs, toads, turtles, and fish) will have plenty to eat, but there will still be some left to breed and continue the species. This survival strategy is called prey satiation.
The Brood X cicadas sound different than the annual cicadas. The sound has been likened to a mechanical sound. Only the males “sing.” They use an organ called the tympanic membrane which is located on each side of their body near the base of their wings. Male cicadas produce the loudest sounds in the insect world.
The males come out first and call to attract the females. Females indicates their willingness to mate by making clicking sounds with their wings. The adult cicadas die shortly after mating then fertilize the soil near the trees where their nymphs will feed and grow.
The massive numbers of 17-year cicadas can harm young trees because the females lay their 500 eggs in young tree branches, so this spring is not a good time to plant small trees. Cicadas are not harmful to people; they don’t bite or sting. They are not toxic to pets in small amounts. But beware!!!! If you have a shellfish allergy, you’ll probably have a similar allergic reaction to cicadas if you eat them! Eww!