Fireflies (a/k/a Lightening Bugs) are in their mating season now. It's great to stand on the deck after sunset and watch their light show in the meadow. They produce a chemical bioluminescence in yellow, green, or a pale red (I've only seen this green). Northwoods fireflies flash on and off in random patterns while fireflies in warmer climes may synchronize their flashing over large groups. Some fireflies sit still at the top of plant leaves while others are on the move. After mating, the females lay eggs and offspring overwinter in their larval form. Interesting facts but doesn't help me get a pic of the firefly flash. Decided to try a timed photo and picked up the whole swarm's action. Pretty cool, isn't it?