Smoky Mountains fireflies
National Geographic digital magazine’s Smoky Mountains fireflies graphic visualizes one evening at the Great Smoky Mountains National Park, at the peak of firefly mating display. Every year in late May or early June, for less than one month, males and females exchange light signals as part of their courtship behavior, creating a remarkable light show that attracts thousands of visitors.
Some of the 10 firefly species active during the early summer nights start their courtship behavior at dusk and stop before it’s truly dark; others prefer the later evening hours. Species can be identified by their flash timing and frequency, as well as by the distance males fly from the ground. This graphic features six commonly spotted species. See it here (it may be behind a paywall).