Fireflies are interesting not only because males and females of many species differ significantly, but especially because they are able to produce light.
Males, females and larvae of the majority of fireflies all have photogenic organs on the ventral surface of certain abdominal segments. The light-producing process is chemical and has an output of almost 100%, but no heat is emitted. Among some families, even the eggs can bio-luminesce. Each species has its own code of flickering, and a specialist in this family can recognize a species only with the number, the duration and the interval between the luminous flashes. Some females answer the flashes of the males of other species, attract them and devour them. This is a special form of mimicry.
The larvae feed on small insects, snails and slugs. The food of the majority of the adults is not known. The larvae and the majority of the adults have night habits; in the course of the day, they can be found hiding in the foliage, the trunks or the branches of the trees.