A rare Appalachian firefly flickers in the forests outside Louisville

A rare Appalachian firefly flickers in the forests outside Louisville

Blue-ghost fireflies, who appear a pale blue-green in person and neon green on camera, are generally found in southern Appalachia but can be found as far north as Bernheim Forest and Arboretum south of Louisville. (Eric Nally)Unlike the blinking yellow-ish light of the big dipper fireflies Kentuckians might see in their backyard, Appalachian blue-ghost fireflies leave their light on for several seconds, leaving a pale trail of blueish-green ligh…