<P> Cyphonocerinae Lampyrinae Luciolinae Ototretinae (disputed) Photurinae and see below </P> <P> Genera incertae sedis: Oculogryphus Pterotus LeConte, 1859 </P> <P> The Lampyridae are a family of insects in the beetle order Coleoptera . They are winged beetles, commonly called fireflies or lightning bugs for their conspicuous use of bioluminescence during twilight to attract mates or prey . Fireflies produce a "cold light", with no infrared or ultraviolet frequencies . This chemically produced light from the lower abdomen may be yellow, green, or pale red, with wavelengths from 510 to 670 nanometers . The eastern US is home to the species Phausis reticulata, which emits a steady blue light . </P> <P> About 2,100 species of fireflies are found in temperate and tropical climates . Many are in marshes or in wet, wooded areas where their larvae have abundant sources of food . Some species are called "glowworms" in Eurasia and elsewhere . The form of the insect which emits light varies from species to species . Sometimes it is the larvae which emit light, sometimes a larviform female, sometimes the eggs emit light . (In the glow worm found in the UK, Lampyris noctiluca, it is the female that is most easily noticed .) In the Americas, "glow worm" also refers to the related 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 . </P>

What is the difference between a lightning bug and firefly
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