Mark Bowler / Fireflies {Lampyridae} in rainforest, Singapore.

Michael Durham / Douglas Fir Glow-worm (Pterotus obscuripennis) displaying bioluminescence at night, Tillamook State Forest, Oregon

Dietmar Nill / Firefly glowing {Lamprohiza splendidula} Germany

Mitsuhiko Imamori / Christmas Tree Firefly (Pyrophanes appendiculata) group lighting up tree at night, southeast Asia

Mitsuhiko Imamori / Christmas Tree Firefly (Pyrophanes appendiculata) at night, southeast Asia

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

Pete Oxford / Firefly (Lampyridae) larva camouflaged on leaf, Yasuni National Park, Amazon Rainforest, Ecuador

Chien Lee / Firefly (Lampyridae) group lighting up at night, Halmahera Island, North Maluku, Indonesia

Chien Lee / Firefly (Lampyridae) group lighting up at night, Halmahera Island, North Maluku, Indonesia

Nature Production / Japanese firefly (Luciola cruciata) Japan

Nature Production / Firefly larva (Lychnuris atripennis) Japan

Juergen Freund / Firefly (Lampyridae) Solomon Islands.

Konrad Wothe / Firefly (Lampyridae) glowing, Tambopata National Reserve, Peru

Juergen Freund / Night shot of Laciola species fireflies in their thousands flying about within a single wild almond or coastal catappa tree "Talisay" (Terminalia catappa) Camarines Sur, Luzon, Philippines 2008. Final...

Piotr Naskrecki / Giant Cockroach (Achroblatta luteola), a possible mimic of toxic firefly beetles, Las Alturas, Costa Rica

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 / Fireflies {Lychnuris / Pyrocoelia abdominalis} male mating with larviform female, Okinawa, Japan

Nature Production / Firefly larva {Lychnuris atripennis} preying on a spiral shell on the ground, Okinawa, Japan

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

Michael Durham / Douglas Fir Glow-worm (Pterotus obscuripennis) displaying bioluminescence, Tillamook State Forest, Oregon

Piotr Naskrecki / Tiger Spider (Argiope savignyi) female wraps Firefly Beetle (Lampyridae) that flew into her web in silk, Costa Rica

Geoff Simpson / Glow worm beetle female glowing {Lampyris noctiluca} UK

Barry Mansell / Firefly lighting bug {Photuris pennsylvanicus} on flower

Doug Wechsler / Firefly in flight {Lampyridae} Pensylvania, USA

Michael & Patricia Fogden / Common Glow Worm (Lampyris noctiluca) larva hanging from cave ceiling, Lamington National Park, Queensland, Australia

Mitsuhiko Imamori / Christmas Tree Firefly (Pyrophanes appendiculata) group and star trails at night, southeast Asia

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

Sue Flood / Catch of firefly squid {Watasenia scintillans} Toyama bay, Japan - bioluminescent squid

Sue Flood / Japanese fishermen with catch of firefly squid {Watasenia scintillans} Toyama bay, Japan - bioluminescent squid

Pete Oxford / Firefly (Lampyridae) larva mimicking branch, Yasuni National Park, Amazon Rainforest, Ecuador

Premaphotos / Beetle (Lamprocera latreillei) resembling a distasteful lycid beetle. This is part of a mimicry complex based on lycid beetles, in rainforest, Brazil

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