Fireflies National Geographic

Find out how—and why—this backyard favorite produces its famous glow.
Each year in late spring the Great Smoky Mountains National Park hosts a special light show, thanks to a species of beetle native to the region. These are the synchronous fireflies, known for coordinating their flashes into bursts that ripple through a group of the insects.

See fireflies magically light up this national park

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Fireflies National Geographic

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