It was another magical evening in Italy. Sitting under the vine covered pergola we watched the flames from the wood fired brick oven lick the surface of our bistecca fiorentina until it had become charred and brown. The scent of lavender and rosemary lingered in the air and as the sun set, the leaves of the olive trees glistened like silver. Framed in the door way of our casa colonica was a well- worn farmstead table with a plate of crostini and the obligatory bottle of vino rosso. And then it happened, out in the distance as if competing with the lights from the Tuscan hill towns in the valley below, flickering dots of white appeared in the sky. Like hundreds of miniature Italian “fairy” lights on a Christmas tree they began to pattern the sky. We were right in the middle of a light show courtesy of Luciola italica, the Italian glow fly.
With over 2,000 different varieties in the temperate and tropical regions of the world, glow flies (often called lightening bugs or fire flies in the States) can be found in gardens and naturalized areas from June through early summer. The ability to generate their LED-like glow is reminiscent of an alchemic reaction that occurs in the insect’s abdomen. Luciferin, a biological pigment activated by the enzyme luciferase, is fueled by oxygen and voilà, bioluminescence. Both the male and female are capable of producing this effortless glow primarily to lure prey, discourage predators and most importantly to attract a mate on those dreamy midsummer nights. The glow fly can only survive in extremely balanced ecosystems, where it can find its preferred food, the garden snail. Together they are part of a balanced ecosystem and your gardening ally. The presence of glow flies illuminating your Italian garden is an indication that your garden is healthy and well-adjusted and living “la dolce vita”.