This is one of the largest broods seen by the most people.īrood X can be seen in Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and Washington, D.C. The survivors make the next brood, says University of Maryland entomologist Michael Raupp. They come out in large numbers so that some of them will survive. When they first come out and try to molt their skin, they can get stuck and are particularly vulnerable to attack. Lots of creatures - even ants - eat cicadas. That’s another evolutionary defense mechanism. They stay underground so long that most predators will have no memory or history to look for them. Some entomologists theorize that it’s an evolutionary defense mechanism. Some, including Brood X, come out every 17 years. There are 15 broods that still come out regularly. This year’s group is called Brood X, as in the Roman numeral 10. But when Europeans first arrived in America, some started calling them locusts and even grasshoppers.ĭifferent groups of cicadas come out in different years in different places. gets these periodic cicadas.Ĭicadas are not locusts. These are called periodical broods.Įxcept for one species in India and one in Fiji, only the U.S. In the United States, there are groups of cicadas that stay underground for either 13 years or 17 years. There are more than 190 known varieties of cicadas in North America and 3,390 of them around the world. They belong to a group of bugs that are different from other insects in that both the nymphs and adults have a beak they use to drink plant fluids. They are a family of insects called magicicadas.
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