Synchronous Fireflies

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Here’s what we've got for you today: Appalachia’s greatest light show.

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Appalachia’s greatest light show

As the sun begins to dip below the horizon in Tennessee's Great Smoky Mountain National Park, a remarkable phenomenon begins to unfold.

The forest comes to life with an otherworldly glow that seems to pulse in unison. For a brief window of time each late spring, fireflies put on a dazzling display of synchronized flashing, creating an unforgettable light show.

Unlike other firefly species in North America, these unique insects emit a distinct flash pattern, with a sudden burst of bright light followed by a brief period of darkness.

The mesmerizing display is a mating ritual where male fireflies zoom around the forest, flashing in perfect harmony, while the females respond from the ground with two quick pulses to mark their location.

It's a sight that will transport you back to a world of childlike wonder.

Explore more:

• Synchronous Fireflies: Your Guide to the Great Smokies’ Annual Light Show (article)