the.com/lightning bug

A small beetle that blinks light from its tail to attract a mate on summer nights.

means A common American name for the firefly, a beetle that flashes light from its abdomen to attract mates.

from A straightforward compound of 'lightning' and 'bug,' coined in American English to describe the insect's flash — comparing its sudden glow to a tiny bolt of lightning. It's chiefly a US regional term (especially Southern and Midwestern), while 'firefly' is the more widespread English name for the same insect; both describe the same beetle family, Lampyridae.

actual name
firefly, but also not a fly
light source
cold chemical reaction, bioluminescence, zero heat
flash pattern
species-specific morse code for mating
dark secret
some females mimic other species to lure and eat males
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