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

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group lighting up at night in forest, Shikoku, Japan

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.

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

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda,Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Hino-River, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Hino-River, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda,Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, endemic species, Yaku-shima UNESCO World Heritage Site, Kagoshima, Japan, May

Mitsuhiko Imamori / Japanese Firefly (Luciola cruciata) on blade of plant leaf, Shiga, Japan

Nigel Cattlin / Field woodrush (Luzula campestris) flower spike. Berkshire, England, UK. April.

Nick Upton / Field wood-rush (Luzula campestris) flowering in grassland, Mendip Hills, Somerset, UK, April.

Bruno D'Amicis / Fireflies (Luciola sp.) males displaying at dusk over a wheat field. Abruzzo, Italy.

Hiroya Minakuchi / Japanese Firefly (Luciola parvula) group flying in forest, Ehime, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group lighting up at night in forest, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group lighting up at night near river, Shikoku, Japan

Yukihiro Fukuda / Light trails of Japanese fireflies (Luciola cruciata) at night, Ichikawa-river, Asago, Hyougo, Japan, July

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

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

Aflo / Firefly (Luciola cruciata) on leaf, Gifu, Japan.

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight over river with Japanese giant salamander (Andrias japonicus) both Japan endemic species, Nationally designated Special Natural Monument,Ichikawa-River,...

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Hino-River, Nichinan-chou, Tottori, Japan, July

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, endemic species, Yaku-shima UNESCO World Heritage Site, Kagoshima, Japan, May

Nature Production / Japanese firefly (Luciola cruciata) Japan

Nature Production / Japanese / Genji Firefly {Luciola cruciata} glowing in Spotted Bellflower, Japan

Nature Production / Japanese / Genji Fireflies {Luciola cruciata} glowing in flight, Shiga, Japan

Nature Production / Japanese / Genji firefly {Luciola cruciata} female glowing, Japan

Mitsuhiko Imamori / Japanese Firefly (Luciola cruciata) swarm at night over river, Shiga, Japan

Mitsuhiko Imamori / Japanese Firefly (Luciola cruciata) swarm at night over river, Shiga, Japan

Mitsuhiko Imamori / Japanese Firefly (Luciola cruciata) swarm at night over river, Shiga, Japan

Mitsuhiko Imamori / Japanese Firefly (Luciola cruciata) on blade, night time, Shiga, Japan

Nigel Cattlin / Field woodrush / Good Friday grass (Luzula campestris) a weed rush flowering in a garden lawn, April Berkshire, England, UK.

Hiroya Minakuchi / Japanese Firefly (Luciola parvula) group flying in meadow, Ehime, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola cruciata) group flying along river at night, Shikoku, Japan

Nature Production / Japanese / Genji Firefly {Luciola cruciata} glowing, Japan

Will Watson / Field woodrush (Luzula campestris) in flower, Stocking Meadow, Herefordshire Wildlife Trust Reserve, England, UK. May, Focus stacked.

Linda Pitkin / Field wood-rush (Luzula campestris) in flower. Surrey, UK. May.

Hiroya Minakuchi / Japanese Firefly (Luciola parvula) group flying in forest, Japan

Hiroya Minakuchi / Japanese Firefly (Luciola parvula) group flying in forest, Japan