Photo of the Day

fireflies lighting up a summer night in Tennessee
February 21, 2015

Flashes of Summer

Fireflies flash and streak through a Tennessee summer night, putting on a spectacular light show to seduce prospective mates. The summertime ritual is one of the most familiar examples of bioluminescence on land.

See more photos from the March 2015 feature story “Luminous Life.”

Photograph by David Liittschwager, National Geographic

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