The firefly was designated the official state insect of Tennessee in 1975 (as was the Ladybug Beetle). A small, unremarkable beetle by day, the firefly transforms midsummer nights into a fairyland of tiny, brilliant twinkling lights - a wonder of nature. Commonly called "lightning bug." The most familiar species of firefly in Tennessee is Photinus pyralls.
The firefly produces light through an efficient chemical reaction using special photic organs, with very little heat given off as wasted energy. One or both sexes use species-specific flash patterns to attract members of the opposite sex (though not all firefly species are bioluminescent as adults). These signals range from a continuous glow, to discrete single flashes, to "flash-trains" composed of multi-pulsed flashes.
Sourced from: http://www.statesymbolsusa.org
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About the geocache -
Should be an easy find and enjoy the hunt. Please return as found. FTF gets an inactivated "firefly" trackable :-) that is inside the cache.
Congratulations to TheBandit7104 for FTF.