Among some species of North American fireflies, females lie in wait for light emitted by males drifting above. A 2022 study found that 96 percent of male fireflies preferred to attempt mating in darkness. No mating occurred in bright artificial light, under which the researchers observed “males crawling directly past or even over females without initiating mating stage one.” The fireflies were “waiting to mate in dimmer conditions,” a New York Times article suggested, “essentially waiting for a night that never comes.”