Periodical cicadas are currently emerging in western Kentucky. This happens to be a 13-year brood: the cicadas that we witnessed in central Kentucky a few years ago were a 17-year brood. Read more about the current emergence at Dr. Lee Townsend's Brood XIX Watch. And you can read more about the differencees between annual cicadas and periodical cicadas at our Critter File: Cicadas.
I hope to get a chance to see the ones in western KY this year. I love the sight and sound of periodical cicadas, and I probably won't get to see them again in central Kentucky until 2025!