We’ve experienced the nightly show of millions of fireflies in our yard and the surrounding fields over the past month. The numbers appear to be reaching its seasonal peak.
Mating pairs are swarmed by males eagerly in search of females. The males will couple with any part of the mating pair in their pheromone-induced mating frenzy.
A unique mating deception (described at Six Months Ago: An Abundance of Fireflies) occurs in this species.
Big dipper fireflies get their name from the dipping flight of the males as they flash, advertising their availability. The light is brightest as they dip and fades as they ascend.
Larvae of this species feed on earthworm.