Synchronous fireflies in Great Smoky Mountains: 2024 viewing lottery, dates announced

Yearly viewings of synchronous fireflies are so popular in the Great Smoky Mountains National Park that a lottery was put in place for spots at the Elkmont viewing area in Tennessee. Here's what to know.

When can I apply to view synchronous fireflies in the Smokies?

An April 23 news release from Great Smoky Mountains National Park stated that synchronous firefly viewing opportunities will take place June 3-10. You can apply for the limited spots by entering a lottery for a vehicle reservation through www.recreation.gov. The lottery opens for applications on Friday, April 26, at 10 a.m. and closes Monday, April 29, at 11:59 p.m.

How many synchronous firefly reservations will be awarded?

A total of 1,120 vehicle reservations, 140 per night, will be issued through the lottery. The results of the lottery will be available no later than Monday, May 6. Each lottery reservation allows one vehicle with a maximum of seven occupants to park at the Elkmont viewing location.

How do I apply to see the synchronous fireflies?

When applying at www.recreation.gov, applicants can enter two dates to take part in the viewing over the eight-day available period. The lottery is conducted through a randomized computer drawing. The application fee is $1, and successful applicants will automatically be issued reservations, with a $24 reservation fee charged to the same credit or debit card used for the application fee. The $24 fee covers the cost of the reservation itself as well as portable onsite restrooms, supplies and nightly personnel costs for managing the viewing opportunity.

Why is there a lottery to see synchronous fireflies in the Smokies?

Every year in late May or early June, hundreds of visitors near Elkmont Campground see the naturally occurring phenomenon of Photinus carolinus, a firefly species that flashes synchronously. Since 2006, the National Park Service has limited access to the Elkmont area to the eight days of predicted peak firefly activity. This helps reduce traffic congestion, provides a safe viewing experience for visitors, and minimizes disturbances to these unique fireflies during their two-week mating period.

Visitors watch the synchronous fireflies at the Elkmont Campground in the Great Smoky Mountains National Park on June 3, 2019. Between 980 and 1100 come to the campground to watch the phenomenon each night of the 8-day mating period.
Visitors watch the synchronous fireflies at the Elkmont Campground in the Great Smoky Mountains National Park on June 3, 2019. Between 980 and 1100 come to the campground to watch the phenomenon each night of the 8-day mating period.

The lottery system was put in place to ensure everyone who applies for a reservation has an equal chance of getting one. Search for “Great Smoky Mountains Firefly Viewing Lottery” at www.recreation.gov for more information and to enter the lottery.

Read on for more information on synchronous fireflies from the National Park Service webpage.

What is a synchronous firefly?

The NPS website explains that Photinus carolinus are beetles, spending most of their lives in the larval stage where they feed on snails, worms, and smaller insects in the leaf litter on the forest floor before emerging to mate and flash their dazzling displays.

Scientists believe that males flash in unison as a way for females to confirm that they are the same species, avoiding other potentially predatory firefly species. The flash pattern is a series of five to eight flashes, followed by a pause of about eight seconds before repeating.

More: Almost time for lightning bugs: Here's how to see rare blue ghost fireflies in Western NC

How rare are synchronous fireflies?

Photinus carolinus are one of at least 19 species of fireflies that live in Great Smoky Mountains National Park, and one of only three species in North America that synchronize flashing light patterns.

The spectacle of synchronous fireflies (Photinus carolinus) has attracted people from all 50 U.S states to visit Elkmont Campground in Great Smoky Mountains National Park.
The spectacle of synchronous fireflies (Photinus carolinus) has attracted people from all 50 U.S states to visit Elkmont Campground in Great Smoky Mountains National Park.

How long do the synchronous fireflies last?

Once synchronous fireflies mature into adults, they only live for about three to four weeks. Their mating season lasts for about two to three weeks yearly, with start dates based on yearly temperature and soil moisture. Peak mating season generally occurs at times from the third week of May to the third week of June.

Nightly displays can also be affected from night to night by weather and temperature.

More: Photos: Synchronous fireflies light up Smoky Mountains National Park

Where can I see synchronous fireflies 2024?

Great Smoky Mountains National Park is the most popular location in the U.S. for synchronous firefly viewing. Here are some other locations from firefly.org:

  • Oak Ridge Wildlife Management Area, Tennessee

  • Rocky Fork State Park, Tennessee

  • Allegheny National Forest, Pennsylvania

  • Congaree National Park, South Carolina

  • Cajon Bonito, Arizona

Synchronous fireflies light up the trees along a trail at the Elkmont Campground in the Great Smoky Mountains National Park on June 3, 2019.
Synchronous fireflies light up the trees along a trail at the Elkmont Campground in the Great Smoky Mountains National Park on June 3, 2019.

Iris Seaton is the trending news reporter for the Asheville Citizen Times, part of the USA TODAY Network. Reach her at [email protected].

This article originally appeared on Asheville Citizen Times: Synchronous fireflies lottery set in Great Smoky Mountains park