“What was once a series of tales from old-timers about the decline of fireflies from the days of their youth is coalescing into a disturbing scientific truth . . . Nearly 1 in 3 firefly species in the United States and Canada may be threatened with extinction, firefly experts estimate in a recent comprehensive assessment.”
Loss of wetland habitat is the leading cause of extinction threat, followed by light pollution, pesticides, and increased soil dessication from climate change.