With a deceptive name, anybody could be fooled into thinking that the firefly is indeed a fly, but it's not. It's actually a beetle, in the order Coleoptera.
Fireflies, also called lightning bugs and glow worms, are winged insects that are iconic for their use of bioluminescence. There are about 2,000 species of firefly and they're found in many places in the world, ranging from North to South America, Europe to Asia.
They're most commonly found near ponds, marshes, streams, rivers, and lakes, and are most prevalent in the rainy season.