These gorgeous photos are the work of Tsuneaki Hiramatsu. Hiramatsu took them at various points over a three-year period between 2008 and 2011 and they are from two different sites in the Okayama prefecture in Japan. The long-exposure photos capture a certain type of firefly called the Genji Botaru. To make the photo where you see hundreds, if not thousands, of small firefly lights, Hiratmatsu used time-lapse photography to take several continuous exposures and then combined those exposures in post-production. Each photo where the firefly lights become trails is just one long exposure.
Check out more of Hiramatsu's photos here.