When living creatures produce and emit light it’s called bioluminescence. The main reason fireflies glow is to find a mate, though they can also light up under other situations as a warning to others.
Blue Sky Science - Morgridge Institute for Research
How do fireflies get their glow? We finally have some answers.
How do bioluminescent fireflies respond to artificial light?, Global Change Ecology
How Swarms of Fireflies Sync Their Flashes - The New York Times
Unusual Labmates: Lighting up the lab
Fireflies
How Do Fireflies Glow? Mystery Solved After 60 Years
How Do Fireflies Glow? Mystery Solved After 60 Years
How Do Fireflies Glow? Mystery Solved After 60 Years
How do fireflies get their glow? We finally have some answers.
How Do Fireflies Flash in Sync? Studies Suggest a New Answer.
How do fireflies get their glow? We finally have some answers.
Synthesized firefly glow has implications for medical imaging tools used to detect tumors and other diseases