“In between the ancient trees, the fireflies lit up. Hundreds at first. Then thousands. Maybe even millions. . . A giant cluster of fireflies would twinkle like tiny white Christmas lights for five or six seconds before vanishing in the dark. Five or six seconds later, they would twinkle again. Up and down the steep mountain road for as far as I could see, a great rolling wave of soft white light. . .
“Of the more than 170 species of fireflies in the United States, Photinus carolinus, the ones that appear in the Smoky Mountains in early June are unique. They’re the only species in this hemisphere that synchronize their flashing light patterns. For two weeks every summer, the fireflies put on a show. Then they’re gone.” Jennie Ivey, “Light Show,” in this month’s Guideposts.