Firefly Pulsing In A Dark Landscape. Royalty-Free Stock Image

Fireflies are found in temperate and tropical climates. Many are found in marshes or in wet, wooded areas where their larvae have abundant sources of food. Some species are called `glowworms` in Eurasia and elsewhere. While all known fireflies glow, only some adults produce light and the location of the light organ varies among species and between sexes of the same species. The form of the insect which emits light varies from species to species . In the Americas, `glow worm` also refers to the closely related family Phengodidae. In New Zealand and Australia the term `glow worm` is in use for the luminescent larvae of the fungus gnat Arachnocampa. In many species of fireflies, both male and female fireflies have the ability to fly, but in some species, the females are flightless.