Lampyris noctilucaScanning electron microscope image of a firefly
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Firefly

Fireflies (family Lampyridae), also known as lightning bugs, are nocturnal, luminous beetles. more...

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These names come from the fact that some species as adults emit flashes of light to attract mates, using special light-emitting organs in the abdomen. The enzyme luciferase acts on the substrate luciferin to stimulate light emission. This reaction is of scientific interest, and genes coding for these substances have been spliced into many different organisms.

Many species, especially in the genus Photinus, are distinguished by the unique courtship flash patterns emitted by flying males as they search for females. Photinus females generally do not fly, but give a flash response to males of their own species.

Many species of lampyrid beetles do not glow as adults, but they all glow as larvae. The larvae of fireflies are generally known as glowworms (but see Phengodidae). Bioluminescence serves a different function in lampyrid larvae than it does in adults. Larval bioluminescence appears to be a warning signal to predators, since many firefly larvae contain chemicals that are distasteful or toxic.

There are more than 2000 species of firefly, found in temperate and tropical environments around the world.

The ancient Chinese sometimes captured fireflies in transparent or semi-transparent containers and used them as (short-term) lanterns.


Life Cycle/Overwintering

Fireflies overwinter (sometimes for several years, depending on the species) during the larval stage by burrowing underground and emerge in the spring. After several weeks of feeding, they pupate for 2-2.5 weeks and emerge as adults.

A few days after mating, a fertilized female will lay her eggs on or just below the surface of the ground. The eggs will hatch in 3-4 weeks and the larva will feed until the end of the summer when they will burrow underground to overwinter.

Read more at Wikipedia.org


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