Millions of mayflies just swarmed the streets of Wilkes-Barre, PA overnight — and by morning, the roads were covered in them. We break down why this happens every year, the wild science behind it, and why it’s actually a good sign for the river.
0:00 The swarm hits Wilkes-Barre
1:00 Why mayflies only live 24 hours
2:00 Why streetlights trigger mass swarms
3:00 What this says about river health
4:00 Other PA towns that get hit too
#Mayflies #WilkesBarre #Pennsylvania #NatureNews
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