How does a firefly flash?
By Chelsie Vandaveer April 9, 2003 killerPlants Tendrils: ~~1~~2~~3~~4~~5 Suggested Reading—>Click here. Assorted Killer Savings Garden Links—>Click here. Fireflies are beetles belonging to the family Lampyridae [lam peer’ i day]. There are an estimated one hundred fifty to one hundred eighty species in North America and up to nineteen hundred species worldwide. Not all firefly species are capable of bioluminescence.