There are two types of cicadas in the world, one that emerges every 17 years and another every 13 years. In 2024, both are coming up from the ground for the first time in 221 years. This means ...

Look (and listen) for them in Alabama, Arkansas ... generally four years earlier -- turning 17-year cicada populations into temporary 13-year cicadas. If this happens repeatedly, we hypothesize ...

Cicadas are relatively large insects ... Brood XIX, on a 13-year cycle, is widely distributed from Alabama, Arkansas, Georgia, Indiana, Illinois, Kentucky, Louisiana, Maryland, Missouri ...

Broods of periodical cicadas only emerge every 13 or 17 years. Some years, none of the named broods emerge. Last year was notable because two groups emerged at once and their areas had some ...