Common Eastern Fireflies (Photinus pyralis), taken June 16, 2025, in Georgia, US
Firefly season is now in full swing here! Every night at dusk, fireflies begin flashing in the hundreds. Depending on the location they flash and the time of night, you can usually tell what kinds are flashing. P. pyralis is usually the first to begin, staying low to the ground and flashing every few seconds, followed later by other, smaller Photinus species who fly a little higher. My favorite to watch are the Spring Tree-Top Flashers (Pyractomena borealis) which, as their name suggests, flash up in the tree canopy. I rarely see them during the day (as they roost in the treetops), but they're beautifully numerous at night. They hover high in the air and flash several times in quick succession, often in sync with a couple others around them. Looking up and seeing dozens of fireflies twinkling in the treetops is a wonderful sight!












