synchronous fireflies

[darkoshi]

How can I have lived here this long, without having heard about this phenomenon before?

Synchronized fireflies lighting skies at Congaree National Park

Comments

[darkoshi]

But I've never seen them flash before. Maybe the ones here don't do that, or it would only be visible in the dark.

[randomdreams]

There are a lot of species, and some don't flash, and some apparently only flash when it's dark and they're In The Mood.