From NatGeo:
Blue Ghost Fireflies, North Carolina
Photograph by Spencer Black, Your Shot
[http://yourshot.nationalgeographic.com/profile/104850/]
A forest floor in North Carolina is traced with the movement of blue ghost fireflies in this time-lapse image by Your Shot contributor Spencer Black, who says the element of surprise compels him toward long-exposure photography.
"These fireflies are unique because their blink pattern is much longer than the common firefly and they hover about a foot off the ground," says Black. "Witnessing them by the thousands, floating above the forest floor in complete darkness, is truly an incredible experience."