Fireflies mainly emit light to attract mates, though this communication method is also used to defend territory. Though it is mostly adult fireflies that glow, there are some species where the larvae and the eggs also emit light.
O, this enchanting forest in the Chūgoku region of Japan is the home to gold fireflies that charm the area regularly every year and in other areas of Japan with clean water. Many people attend a Hotaru Matsuri (Firefly Festival). Amazing :D I love Japan
Lightning bugs or fireflies are beetles that can produce lights. Lightning bugs can light up during all stages of their lives, including larvae and pupae. In some species of lightning bugs, the eggs glow as well!