Brood X Periodical Cicadas Emerge In 15 States : NPR
https://www.npr.org/2021/04/27/991168811/here-come-the-cicadas
WEBApr 27, 2021 · Exactly when the creatures will crawl out of the ground and head for the treetops to mate depends on the weather and the ground temperature — the ground needs to be about 64 degrees, and a little...
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