The perfect swarm

Fireflies are winged beetles. They use bioluminescence – emitting light due to a chemical reaction in their abdomens – to attract mates or prey.

Eileen Claffey in central Massachusetts calls this image The Perfect Swarm. She wrote that it’s “… 44 stacked images of the mating cycle of fireflies. Humid, wet, and warm.”

Read more: Why do fireflies light up?

Here’s another one from Eileen Claffey, fireflies and startrails from June 17, 2018. Eileen commented that the field near her house hasn’t been sprayed with pesticides in the 15 years she’s lived there. She said, “I feel like a kid when this swarm happens. I get giddy!” Thank you, Eileen.

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Deborah Byrd