Fireflies used to light up the summer, but now habitat loss, pesticides and light pollution threaten lightning bugs with extinction.

More fireflies than usual are lighting up summer evenings in parts of the U.S. But scientists say the lightning bugs are still on the decline.

More fireflies than usual are lighting up summer evenings in the U.S. Northeast. But scientists say the lightning bugs are still on the decline.

NEW YORK (AP) — 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 ...

More fireflies than usual are lighting up summer evenings in the U.S. Northeast. But scientists say the lightning bugs are still on the decline. A particularly wet spring may have ...

More fireflies than usual are lighting up summer evenings in the U.S. Northeast. But scientists say the lightning bugs are still on the decline.