tropical American click beetle having bright luminous spots
"The children chased the glowing fireflies through the humid Amazonian jungle, mesmerized by their sudden flashes of light in the dark canopy."
nocturnal beetle common in warm regions having luminescent abdominal organs
"After sunset, the children ran through the tall grass to watch the fireflies blink in the humid summer air."
Any beetle of the family Lampyridae, which exhibit bioluminescence during twilight.
"A child caught a firefly in a jar to watch it glow softly as dusk settled over the meadow."