KELLETTVILLE, Pa. ― Every year in late June, Peggy Butler and her husband, Ken, welcome visitors to rural northwestern Pennsylvania for the chance to glimpse the rare and beguiling Photinus carolinus.

These light-up insects put on the most magical show of the summer. Fireflies light up during twilight to attract mates using bioluminescence in their abdomens. Regional differences influence whether ...

DELAWARE SEASHORE STATE PARK, Del. — On a muggy July evening, Delaware state biologist Jason Davis is doing what kids have done for ages: Trying to catch a firefly. It’s nowhere near as easy as the ...

It wouldn't be summer here in New Jersey without fireflies ... or are they lightning bugs? Regardless, these insects are a harbinger of the season, typically appearing in May, June or July, ...

Summertime in the South is synonymous with the twinkling, light-up beetles that linger in the bushes, on the edge of the woods, or just beyond the lake. Those floating incandescent insects that are ...

Fireflies are lighting up summer evenings across the U.S. Northeast, putting on dazzling shows in backyards and city parks. There's no official count, but experts say a particularly wet spring may ...

Fireflies, also known as lightning bugs (or even glowworms) are a part of the Lampyridae family that produce a glowing light from their abdomens. It’s not magic—their famous glow by is an example of ...

Bali's fireflies have nearly disappeared from some villages. A conservationist is breeding thousands of the insects and ...