the.com/firebug

the tiny beetle that throws a rave on every fallen tree trunk.

means A person who deliberately sets fires, or, less ominously, an insect of the genus Pyrrhocoris with bold red-and-black coloring.

from A transparent American compound of "fire" + "bug," coined in the 19th century. The "bug" part leans on the old sense of a creature that glows or swarms, and the word stretched easily from literal insect to the figurative "bug" of obsession — a person buggy about fire, i.e., an arsonist.

true name
Pyrrhocoris apterus, the red-and-black true bug
swarm habit
clusters by the hundreds on sunny bark
slang twist
also means a human arsonist
mostly wingless
adults often skip flight entirely
linden lover
feeds on fallen lime tree seeds
for instance

firebug insect species — photinus pyralis, the lightning bug found across eastern north america, famous for bioluminescent flashing

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