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Writer's pictureKristina Light

Experience Synchronous Fireflies in the Great Smoky Mountains: A Guide



How to See Synchronous Fireflies in the Smoky Mountains

It was autumn, 2008, and I was strolling through the Country Club Plaza Art Fair, a regional art fair featuring hundreds of artists. One particular booth caught my eye. Stunning nature photography printed on glass captured the forest at night, bedazzled with the warm yellow glow of hundreds of Tennessee fireflies. I had never seen anything like it.


Sure, I have fireflies in my backyard as any Midwesterner does, but I have never seen hundreds, maybe thousands, all at once. This phenomenon struck my curiosity and I began a conversation with the photographer, Radim Schreiber.


I learned that Radim grew up in the Czech Republic where fireflies are rare. When he came to Iowa to study photography in college, he discovered the nighttime wonder of fireflies and began photographing them. Over time, he developed a technique to photograph fireflies and came to meet scientists and learn more about the luminescent beetles. He has photographed fireflies worldwide, but he claims that the best firefly experience occurs every summer in the Great Smoky Mountains.


There are over 2,400 species of fireflies in the world, 19 of which call the Smoky Mountains home. But, only one species in the Smokies is known to perform a synchronous mating ritual when they all flash in unison each summer.


The Smoky Mountain’s Summer Lightshow: Synchronous Fireflies


Synchronous fireflies glowing in the Great Smoky Mountains during peak firefly season
Synchronous fireflies glowing in the Great Smoky Mountains during peak firefly season

For those "in the know," seeing the Synchronous Fireflies of the Great Smoky Mountains is a lifelong dream and such a draw that the National Park Service conducts an annual lottery to regulate the number of attendees, protecting both the insects and the wonder of the event for spectators.


Every year at the fair, I marvel at Radim's Smithsonian award-winning photography and, thanks to his advice, every spring I enter the NPS Lottery to see the fireflies. Scientists study the fireflies and predict their peak performance week, awarding a set number of permits to enter the campground for firefly viewing. People from all over the world enter the drawing (there is a $1/household entry fee) hoping to see this mesmerizing mating ritual. And, every year until 2024, I lost.


This year, I won, and on June 5th, our family experienced God’s Fireworks, also known as the Synchronous Fireflies of the Smoky Mountains.


Showtime at Elkmont: The Best Spot for Synchronous Firefly Viewing


The Troll Bridge at Elkmont Campground in the Great Smoky Mountain National Park: The Best Spot for Firefly Viewing
The Troll Bridge at Elkmont Campground in the Great Smoky Mountain National Park: The Best Spot for Firefly Viewing

We arrived at Elkmont Campground in the Great Smoky Mountains National Park with our firefly permit, choosing a spot near Troll Bridge. We learned that the NPS has adjusted the rules for attending the event over the years. In our case, they permitted one family-size vehicle with up to seven passengers. Campers at Elkmont are also able to view the fireflies. Guests are asked not to catch fireflies or touch them, to turn off all lights, and to use only a red light during the show.


As the sky grew dim beginning around 8:45, thousands of fireflies began flashing in the hills. It reminded me of instruments warming up for an orchestra, thousands all flashing here and there. This precursor to the real show may have been my favorite part of the evening because you could see the fireflies AND the forest.

The night sky became darker still, and then they stopped with nothing happening at all. A ranger came and said, "That's all folks." (as a joke to make everyone panic). The ranger explained that the fireflies warm up and then calm down before the show.


And again, just as if attending an outdoor summer musical, the crowd is chatting, and then, as the show begins, the crowd grows silent in amazement.


Everyone was in awe. It's almost more than the brain can take in. The number of fireflies flashing in unison is overwhelming, much like watching the finale to a fireworks show for hours as close as you can watch it - with no noise, just nature - wind, the rushing water, and occasional birds chirping.


We were amazed at the millions of bright fireflies flashing; it reminded me of riding Space Mountain if one were to ride it for hours without the actual ride.


What Are Synchronous Fireflies? And, are they the only fireflies at Elkmot?


That evening, two species of fireflies put on a show: blue ghost fireflies with a soft blue light that fly slowly and stay lit, creating a soft trail of light, and the synchronous fireflies that are like bright white lights and flash in unison. I was surprised at how bright they were, almost appearing to be white, not warm yellow like home, though the camera caught the yellow.


During the show, the females start low to the ground flashing, and the males are up in the tree canopy. As they communicate, they try to find a mate, slowly merging until you are surrounded. I stood up several times from my chair, and it was 360 degrees featuring millions of fireflies all flashing at once.


Our family spent time in Elkmont Campground from 6 pm - 11:30 pm... and then we were ready for bed. As we were leaving, the fireflies were still flashing. Then, the question everyone asks: Are they really just in the Elkmont Campground section of the national park? And, the answer is, yes. As we left, when you turn away from the campground, you no longer see them.


How to See the Synchronous Fireflies of the Great Smoky Mountains:

  • Enter the NPS Lottery in late April. Winners are notified via email in May. The viewing opportunity will occur in June (date TBD).

  • Camp at Elkmont Campground in the Great Smoky Mountains National Park during Firefly viewing week in June.

  • Yes, the synchronous fireflies are specifically in the Elkmont Campground of the park. Many visitors comment that they see fireflies throughout the national park and the region during the summer, and they do. There are 19 species of fireflies at GSMNP, however the synchronous fireflies specifically mate in the Elkmont Campground.

  • Congaree National Park in South Carolina is also home to synchronous fireflies. They host their lottery from late March to early April and their viewing is from late May to early June. Learn more about Congaree National Park's firefly lottery here.

  • More Synchronous Firefly locations and viewing information.



Firefly Experience by Radim Schreiber
Firefly Experience by Radim Schreiber

One of my favorite memories in the National Parks was seeing the synchronous fireflies in the Great Smoky Mountains. I first learned of these amazing fireflies through the photography of artist Radim Schreiber. Schreiber's book is a masterpiece capturing the beauty of this natural phenomenon. Learn How to See the Synchronous Fireflies in the Smoky Mountains here.


Synchronous Fireflies: An Ethereal Experience in Tennessee

Adventure is characterized by extraordinary experiences. Observing "God's Fireworks" in the Great Smoky Mountains was truly one of those experiences.


More Adventures to Explore in the Smoky Mountains


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