It sounds like spring 2024 will be abuzzing as more than a trillion cicadas are expected to appear across the U.S.

For the first time in 221 years, the two groupings of cicadas, brood XIX and XIII, will emerge from the underground in 17 states across the country, according to Fox Weather.

Some of the states that will see both broods in 2024 are Illinois and Indiana. “Most cicada species come out every year, but in the United States, there are two periodical broods of cicadas that stay underground for either 13 years or 17 years,” Fox Weather reported. “The last time they came above ground at the same time was in 1803.”

This year will see a “simultaneous explosion” of cicadas across North America, Hannah Fry, a British mathematician and science presenter, said in a video posted to her Instagram page.