Fireflies produce a "cold light", with no infrared or ultraviolet frequencies. This chemically-produced light from the lower abdomen may be yellow, green, or pale red
Using a slow shutter speed on the camera makes the fireflies appear to leave ghostly phosphorescent trails between the trees
No, these aren't deleted scenes from James Cameron's sci-fi epic Avatar - these spectacular images show mesmerising phosphorescent patterns swirling through a forest that are all produced by earthbound insects.
Fireflies are winged beetles and give off a green luminous glow from chemicals in their lower abdomen in a process called bioluminescence.
As babies - the larval stage of the insects' lives - they use their glow to warn off predators but as adults they use the same phenomenon to attract mates.