Yashpal Rathore / Composite image of Fireflies synchronize display just after first shower of monsoon, on moonless night. India.

Juergen Freund / Timelapse of Fireflies (Lampyridae) flying around a tree, Bicol, Philippines.

Juergen Freund / Timelapse of Fireflies (Lampyridae) flying around a tree, Bicol, Philippines.

Tony Wu / Fireflies (Luciola parvula himebotaru) flashing at night for courtship and reproduction. Gifu, Japan. Composite image

Aflo / Firefly (Lampyridae) Japan.

Paul Hobson / Glowworm (Lampyris noctiluca) at night, Cambridgeshire, England, UK, August.

Mark MacEwen / Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.

Yukihiro Fukuda / Light trails of Japanese fireflies (Hotaria parvula and Luciola cruciata), Nichinan-chou, Tottori, Japan, July, Endemic species.

Floris van Breugel / Syncronous Fireflies (Photinus carolinus) illuminate the lush forests of Smoky Mountains National Park, Tennesse, USA, July

Floris van Breugel,Floris van Breugel / Tent at night surrounded by Fireflies (Photinus carolinus) Great Smoky Mountains National Park, Tennessee, USA, June 2013.

Nature Production / Japanese firefly (Luciola cruciata) on leaf at night, with light trails of hundreds of other fireflies in flight in the background, Japan

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Ichikawa-Riveer, Asago Hyougo, Japan, July