Blue Ghost Fireflies, North Carolina

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."