An image of dancing fireflies beneath a starry sky, on summer solstice eve, June 20, 2014, on a stormy night with many thunderstorms about. To the southeast here skies were clear but clouds and another storm was moving in from the west at right. But it was a warm night so the fireflies were dancing, caught here as the green lights trailing in the foreground. The sky is bright from perpetual twilight and the ground is partly lit by distant lightning.
The forground is a stack of 3 exposures to add more firefly lights, but the sky is just one exposure, 25s at ISO 3200 at f/2.8 with the 16-35mm lens and Canon 6D.
The Amazing Sky 