As a kid, many a June twilight was spent trailing the beacons of fireflies in the deepening dusk to try and catch them in my hands. I was endlessly enthralled. Endlessly until Mom called to clean up for bed, at least. It pleases me that my own two children went through this phase, presenting me with Mason jars of flashing green magic before they released “their” fireflies outdoors. For the longest time, I remained enchanted by those shimmering, summer-night faerie lights. These days I’m charmed only by the memory of such. They’re nearly gone from our farm now, a paltry few flashing in a meadow that once hosted a Milky Way of moving lights.
With 2,000 known species, fireflies are native to both the Americas and Eurasia. In the larval stage, they’re carnivorous, and eat many insects we consider pests. You may see young fireflies, grub-like “glowworms,” in the lawn or flower bed. Larvae also feed on worms, slugs and snails before wriggling down into the soil or other protected space to overwinter. After a short pupal stage, they emerge to mate. Adults mainly subsist on pollen and nectar, though a few don’t eat at all in their brief grown-up phase.