A firefly in ancient Africa
A firefly, sometimes called a lightning bugs, was a type of nocturnal, bioluminescent insect.
A type of firefly lived on the planet Archer IV. (ENT: "Strange New World")
In a version of the story of the girl who made the stars Mike Burnham told to his his daughter in the 2230s, the titular girl used a firefly to fashion a lantern so she could travel at night with some light. (ST: "The Girl Who Made the Stars")
In 2256, Gabriel Lorca described Species GS54 as lightning bugs. (DIS: "Context Is for Kings")