For a few weeks in late spring, thousands of fireflies emerge at the Congaree National Park in South Carolina to blink in synchrony. Scientists are trying to learn their secrets and to protect them.

Want to see the annual synchronized fireflies event at Congaree National Park this year? Better get ready to sign up soon.

Want to see the annual synchronized fireflies event at Congaree National Park this year? Better get ready to sign up soon.

For a few weeks in late spring, thousands of fireflies emerge at the Congaree National Park in South Carolina to blink in synchrony. Scientists are trying to learn their secrets and to protect them.

Every year, Congaree National Park hosts synchronous fireflies for approximately two weeks between mid-May and mid-June.

Deep in the pitch-black woodlands of Congaree National Park lives a mysterious insect that draws thousands of onlookers each year. The forest is dead quiet at night, aside from the chirping of ...

Fireflies at Congaree National Park flash in unision in this file photo from 2016. Only a few lucky winners get a chance to see the natural light show each year, which is currently protected by ...

COLUMBIA, S.C. (WIS) - As spring returns to the Midlands, the Congaree National Park is preparing for a beautiful natural phenomenon. Synchronous fireflies, which are fireflies that gather in a ...