The Pyralis firefly, common east of the Rocky Mountains.
Photo courtesy Kevin Adams
The Pennsylvania firefly, common from the Atlantic coast to Texas and north to Manitoba.
Photo courtesy Dwight Kuhn
Fireflies blend with the stars above Plymouth, Mass.
Photo courtesy Matt Bendaniel/Bruce Coleman Inc.
There are some 2,000 species of fireflies, many of them native to the tropics in South America and the Pacific Ocean. They’re all members of the family Lampyridae, which loosely translated means “shining fire.”