How do fireflies produce light?

Fireflies produce light through a chemical reaction in their abdomens involving luciferin, luciferase, oxygen, and ATP. This reaction emits light with minimal heat, making it highly efficient. Fireflies use their bioluminescence to attract mates, communicate, or deter predators. The flashing patterns are unique to each species, ensuring effective communication during mating season. This natural light production is a remarkable adaptation in the insect world.